Study Island : Object Motion

If an object goes from 50 mph to 10 mph in 5 seconds, what is its acceleration? A. -8 mph/s B. 8 mph/s C. -4 mph/s D. 4 mph/s

A. -8 mph/s

Derek runs 4 laps around the track. If each lap around the track is 0.25 miles long, and he starts and stops in the same location, what is Derek's displacement? A. 0 miles B. 0.25 miles C. 1.0 miles D. 0.5 miles

A. 0 miles

How long would it take to travel 70 miles at a speed of 40 mph? A. 1.75 hours B. 2.25 hours C. 3.5 hours D. 0.75 hours

A. 1.75 hours

If it takes Jeff 3 hours and 33 minutes to drive 500 miles, what is his average velocity over this time? A. 141 mi/hr B. 154 m/s C. 160 mi/hr D. 149 m/s

A. 141 mi/hr

A billiard ball is rolling at a constant rate along a plane for 7 seconds. If it is moving in a straight line with an initial position of 7 meters and a final position of 21 meters, what is its velocity? A. 2 m/s B. 3 m/s C. 1 m/s D. 5 m/s

A. 2 m/s

A commercial passenger jet can travel up to 970 km/hr at an altitude of 30,000 feet. At this speed, how long will it take the jet to travel 2,645 kilometers? A. 2.7 hrs B. 3.1 hrs C. 1.7 hrs D. 2.3 hrs

A. 2.7 hrs

If a car travels 294 miles in 9.8 hours, what is the car's speed? A. 30 mi/hr B. 35 mi/hr C. 33.3 mi/hr D. 29.8 mi/hr

A. 30 mi/hr

I'm just going to say in advance, that some of the questions that you have in your study island may not be in here. These are just the questions that I got on mine.

Also, I recommend using ( ctrl + f ) and paste the question (not the answers) in the box that pops up. It's a slot easier than scrolling through everything. Also, please make sure that the wording in the questions are EXACTLY the SAME as what is in your question.

An object with an initial velocity of 93 m/s has a final velocity of 4 m/s after 58 seconds. What is the object's acceleration? A. -1.67 m/s2 B. -1.53 m/s2 C. 1.53 m/s2 D. 1.67 m/s2

B. -1.53 m/s2

An object with an initial velocity of 96 m/s has a final velocity of 60 m/s after 20 seconds. What is the object's acceleration? A. -7.8 m/s2 B. -1.8 m/s2 C. 7.8 m/s2 D. 1.8 m/s2

B. -1.8 m/s2

Car A's position is 6 meters, and Car B is located 9 meters away from Car A. So, in the reference frame shown below, what is Car B's position? A. 9 meters B. 15 meters C. -3 meters D. 54 meters

B. 15 meters

If it takes Jeff 3 hours and 10 minutes to drive 500 miles, what is his average velocity over this time? A. 149 m/s B. 158 mi/hr C. 160 mi/hr D. 154 m/s

B. 158 mi/hr

Cars are designed to decelerate passengers over a certain distance. This allows part of the impact to be absorbed in case of a collision. A crash test dummy is in a car traveling at an initial velocity of 17 m/s. The car slams into a brick wall, bringing it to rest at a constant rate of deceleration. If the time between the moment of impact and the moment the crash test dummy comes to rest is 0.5 seconds, how far has the crash test dummy traveled in this time? A. 8.5 meters B. 17 meters C. 12.8 meters D. 4.3 meters

B. 17 meters

If an elk covers 100 meters in 5 seconds, at what speed is the elk running? A. 42.72 m/sec B. 20 m/sec C. 18.67 m/sec D. 20.12 m/sec

B. 20 m/sec

A sailboat is traveling north at a constant speed of 30 km/hr. If a gust of wind suddenly hits the sail so that the boat starts traveling northwest at a constant speed of 30 km/hr, which of the following has changed? I. the speed of the boat II. the velocity of the boat III. the direction of the boat IV. the displacement of the boat A. II only B. II, III, and IV only C. III and IV only D. I, II, III, and IV

B. II, III, and IV only

Mrs. Cooper rides the bus to work one morning. She sits on one of the bench seats and places her purse next to her on the seat. When the bus makes a sharp left turn, what happens to the purse? A. The purse experiences a force. B. The purse accelerates. C. The purse remains motionless. D. The purse changes its volume.

B. The purse accelerates.

All motion is relative to a frame of reference. What is the frame of reference for a sunset? A. sun B. earth C. moon D. all of these

B. earth

Bernadette's dog, Shadow, is ill. She carefully lays him in the passenger seat of her car where he curls up to sleep. She then gets in to drive him to the vet. Bernadette's mother waves goodbye as they pull out of the driveway and head down the road. In Bernadette's mother's frame of reference, Shadow is A. not moving. B. moving at the same speed as Bernadette. C. moving closer. D. moving at the same speed as Bernadette's mother.

B. moving at the same speed as Bernadette.

What is the final velocity of an object that starts at 60 mph and accelerates at a rate of -10 mph/sec for 4 seconds? A. 50 mph B. -20 mph C. 20 mph D. 100 mph

C. 20 mph

How are scalar quantities different from vector quantities? A. Scalar quantities represent a multiple or a fraction of a true measurement, whereas vector quantities represent unaltered data. B. Vector quantities only indicate the direction of a measurement, whereas scalar quantities only indicate the magnitude of a measurement. C. Scalar quantities only describe the magnitude of a measurement, whereas vector quantities describe both the magnitude and direction of a measurement. D. Vector quantities are inversely related to scalar quantities;that is, when a scalar quantity decreases, a vector quantity must increase.

C. Scalar quantities only describe the magnitude of a measurement, whereas vector quantities describe both the magnitude and direction of a measurement.

What is the difference between speed and velocity? A. Velocity can never be constant; speed can be constant. B. Speed is velocity with direction. C. Velocity is speed with direction. D. Speed can never be constant; velocity can be constant.

C. Velocity is speed with direction.

Accelerating frames of reference must experience A. a uniform force. B. a change in mass. C. a change in velocity. D. a uniform acceleration.

C. a change in velocity.

Bernadette's dog, Shadow, is ill. She carefully lays him in the passenger seat of her car where he curls up to sleep. She then gets in to drive him to the vet. Bernadette's mother waves goodbye as they pull out of the driveway and head down the road. In Bernadette's frame of reference, Shadow is A. moving away. B. moving at the same speed as her mother. C. not moving. D. moving closer.

C. not moving.

When a car is said to be driving on the highway at 70 mph, what frame of reference is used to calculate that speed? A. the adjacent car B. the interior of the car C. the Earth's surface D. the trees surrounding the highway

C. the Earth's surface

An object with an initial velocity of 87 m/s has a final velocity of 79 m/s after 43 seconds. What is the object's acceleration? A. -3.86 m/s2 B. 3.86 m/s2 C. 0.19 m/s2 D. -0.19 m/s2

D. -0.19 m/s2

What is the final velocity of an object that starts at 30 mph and accelerates at a rate of -10 mph/sec for 4 seconds? A. 70 mph B. 20 mph C. 10 mph D. -10 mph

D. -10 mph

What is the final velocity of an object that starts at 15 mph and accelerates at a rate of -10 mph/sec for 3 seconds? A. 45 mph B. 5 mph C. 15 mph D. -15 mph

D. -15 mph

If an object goes from 70 mph to 40 mph in 5 seconds, what is its acceleration? A. 7 mph/s B. -5 mph/s C. 3 mph/s D. -6 mph/s

D. -6 mph/s

How long would it take a car to accelerate from 20 mph to 60 mph if its acceleration is 10 mph/s? A. 4.5 s B. 5 s C. 3 s D. 4 s

D. 4 s

An object's instantaneous velocity is measured _______ time. An object's average velocity is measured _______ time. A. at every point in; at any point in B. over a length of; at every point in C. at a particular moment of; at any point in D. at a particular moment of; over a length of

D. at a particular moment of; over a length of

onsider a vector of magnitude v and components vx and vy,as shown below. Which of the following is true? there's a bunch of symbols and stuf that I can't/won't type out. I did my best to resemble the answer in the answer on the right though.

Vy / Vx = tan(θ)

Tom walks to school every morning. He starts at a position of 3200 meters from school. If Tom walks at a constant speed of 1 meter per second straight toward his school, how far from school is he after 10 minutes of walking? A. 2600 meters B. 3190 meters C. 10 meters D. 600 meters

A. 2600 meters

Use the diagram below to answer the following question. Mr. Watson, the schoolbus driver, follows the same path every day.He leaves the school at 6 AM, gets gasoline, and then picks up students at the Shady Oaks subdivision and Maple Leaf apartment complex before returning back to school at 7:15 AM. What is the average speed of the bus? A. 32.8 km/hr B. 41 km/hr C. 82 km/hr D. 31.5 km/hr

A. 32.8 km/hr

A man with a rocket strapped to his back travels 48 kilometers in 10 seconds. If the positive direction of velocity is defined as west and the man flies out of New York City in a due easterly direction, what is his average speed after 10 seconds of flight? A. 4.8 km/s B. -48 m/s C. -4.8 km/s D. 0.2 km/s

A. 4.8 km/s

Muriel is driving along the highway with her friend Cherise. Every minute, Muriel reads her speedometer, and Cherise writes down the speed. The resulting data for a ten-minute period is presented in the chart below. During those 10 minutes, the car traveled 8.7 miles. At minute nine, what was the car's instantaneous velocity? A. 51 mi/hr B. 47 mi/hr C. 52 mi/hr D. 49 mi/hr

A. 51 mi/hr

Cars are designed to decelerate passengers over a certain distance. This allows part of the impact to be absorbed in case of a collision. A crash test dummy is in a car traveling at an initial velocity of 21 m/s. The car slams into a brick wall, bringing it to rest at a constant rate of deceleration. If the time between the moment of impact and the moment the crash test dummy comes to rest is 0.6 seconds, how far has the crash test dummy traveled in this time? A. 6.3 meters B. 18.9 meters C. 25.2 meters D. 12.6 meters

A. 6.3 meters

Which of the following statements are true of inertial frames of reference? I. They can stand still. II. They can move at constant velocities. III. Time flows at the same rate. IV. Newton's laws are valid. A. I, II, III, and IV B. I and IV only C. I, II, and III only D. I, III, and IV only

A. I, II, III, and IV

Mandy is driving north at a velocity of 50 km/hr. If her sister, Sandy, is driving another car at a velocity of -25 km/hr, in what direction is Sandy driving? A. south B. north C. east D. west

A. south

The rate at which an object moves is the object's __________. A. speed B. force C. acceleration D. velocity

A. speed

Gabe owns a really fast turtle, named Fluffy. One day, Gabe decides to graph Fluffy's position through time as it accelerates from rest to its top speed. The black line on the graph below is Fluffy's position through time. Calculating the slope of which line on the graph will yield Fluffy's average velocity from 0 to 1 seconds? A. the red line B. the green line C. the blue line D. the x-axis

A. the red line

An antelope trots through the grasslands at a velocity of 3 m/s. Suddenly, a lion begins to chase the antelope. If the antelope accelerates at a rate of 2 m/s2, what is the antelope's final velocity after 9 seconds? Assume that the antelope moves in only one direction. A. 15 m/s B. 21 m/s C. 54 m/s D. -15 m/s

B. 21 m/s

Consider a vector of magnitude v and components vx and vy, as shown below. If vx = 1.2 m and vy = 0.6 m, what is θ? A. 0.035° B. 27° C. 1.3° D. 63°

B. 27°

How long would it take a car to accelerate from 15 mph to 75 mph if its acceleration is 20 mph/s? A. 4 s B. 3 s C. 3.5 s D. 2.5 s

B. 3 s

Use the diagram below to answer the following question. Mr. Watson, the schoolbus driver, follows the same path every day. He leaves the school at 6 AM, gets gasoline, and then picks up students at the Shady Oaks subdivision and Maple Leaf apartment complex before returning back to school at 7:15 AM. What is the total distance that Mr. Watson travels every day? A. 29 km B. 41 km C. 13 km D. 28 km

B. 41 km

Speed is the amount of distance that an object travels per unit time. speed = d/t Velocity is speed with direction. Use this information to calculate the velocity of a truck that travels 2,000 kilometers in 25.5 hours from Texas to Georgia. A. 0.01 km/hr west B. 78.4 km/hr east C. 78.4 km/hr west D. 0.01 km/hr east

B. 78.4 km/hr east

Use the diagram below to answer the following question. Mr. Watson, the schoolbus driver, follows the same path every day. He leaves the school at 6 AM, gets gasoline, and then picks up students at the Shady Oaks subdivision and Maple Leaf apartment complex before returning back to school at 7:15 AM. What is Mr. Watson's displacement when the bus is parked at the Maple Leaf apartment complex? A. 41 km B. 58 km C. 12 km D. 29 km

C. 12 km

Sally is going shopping with her friend Susan at the mall, which is located 10 kilometers away from her house. She drives half-way to the mall and then realizes she forgot her purse at home. She immediately turns around, goes back home to get her purse, and then drives directly from her house to the mall. What is the total distance that Sally traveled? A. 10 km B. 5 km C. 20 km D. 15 km

C. 20 km

An antelope trots through the grasslands at a velocity of 1 m/s. Suddenly, a lion begins to chase the antelope. If the antelope accelerates at a rate of 3 m/s2, what is the antelope's final velocity after 8 seconds? Assume that the antelope moves in only one direction. A. 24 m/s B. -23 m/s C. 25 m/s D. 23 m/s

C. 25 m/s

A cheetah is capable of accelerating at a rate of 19 m/s2. If a cheetah accelerates at this rate from an initial velocity of 2 m/s over a distance of 19 meters, what velocity does it reach? A. 38 m/s B. 33 m/s C. 27 m/s D. 19 m/s

C. 27 m/s

Matilda flies hot air balloons. If the graph below represents the positions of her balloon at takeoff (point A) and at its maximum height (point B), what is Matilda's displacement from her initial position when the balloon is at its maximum height? A. 39.0 meters B. 35.9 meters C. 32.8 meters D. 32.0 meters On the graph point A is ( 0, 5 ) and point B is ( 12, 32 )

C. 32.8 meters

Two vectors, v1 and v2, both have magnitudes of 3.2 m. If the angle between the vectors is 101°, what is the magnitude of v1- v2? A. 6.4 m B. 4.5 m C. 4.9 m D. 5.5 m

C. 4.9 m

What total distance will be covered by traveling at 40 mph for 90 minutes? A. 70 miles B. 50 miles C. 60 miles D. 40 miles

C. 60 miles

Karl is an astronaut living in the year 2257. He discovers a new planet, which he calls Planet C12-6, and this planet has absolutely no atmosphere. If Karl drops a 20 kg weight from a height of 294 meters and measures its final velocity as 64 m/s immediately before it strikes the surface of the planet, what is the rate of acceleration due to gravity on Planet C12-6? A. 13.9 m/s/s B. 0.1 m/s/s C. 7 m/s/s D. 1.4 m/s/s

C. 7 m/s/s

Karl is an astronaut living in the year 2257. He discovers a new planet, which he calls Planet C12-6, and this planet has absolutely no atmosphere. If Karl drops a 20 kg weight from a height of 268 meters and measures its final velocity as 64 m/s immediately before it strikes the surface of the planet, what is the rate of acceleration due to gravity on Planet C12-6? A. 15.3 m/s/s B. 0.1 m/s/s C. 7.6 m/s/s D. 1.3 m/s/s

C. 7.6 m/s/s

Scalar quantities describe only the magnitudes of measurements, whereas vector quantities describe the magnitudes and directions of measurements. Which of the following are vector quantities? I. acceleration II. force III. length IV. mass V. speed VI. velocity A. III, IV and V only B. I, III and V only C. I, II and VI only D. II, IV and VI only

C. I, II and VI only

While on his lunch break, Stenard likes to stop by a number of different locations before returning to school. The diagram below illustrates his usual path. If Stenard begins his path at school, what is his total displacement at the end of his lunch break? A. 52 meters B. 496 meters C. 122 meters D. 0 meters

D. 0 meters

Speed is the amount of distance that an object travels per unit time. speed = d / t Velocity is speed with direction. Use this information to calculate the velocity of a truck that travels 2,500 kilometers in 21.5 hours from Georgia to Texas. A. 0.01 km/hr east B. 0.01 km/hr west C. 116.3 km/hr east D. 116.3 km/hr west

D. 116.3 km/hr west

Tom walks to school every morning. He starts at a position of 3200 meters from school. If Tom walks at a constant speed of 2 meters per second straight toward his school, how far from school is he after 10 minutes of walking? A. 1200 meters B. 3180 meters C. 20 meters D. 2000 meters

D. 2000 meters

If a lion covers 110 meters in 5 seconds, at what speed is the lion running? A. 22.34 m/sec B. 20.12 m/sec C. 42.72 m/sec D. 22 m/sec

D. 22 m/sec

A cheetah is capable of accelerating at a rate of 19 m/s2. If a cheetah accelerates at this rate from an initial velocity of 2 m/s over a distance of 22 meters, what velocity does it reach? A. 41 m/s B. 35 m/s C. 19 m/s D. 29 m/s

D. 29 m/s

The school track is 200 meters in diameter and perfectly circular. If Mr. Woods, the P.E. teacher, runs around half of the track in 54 seconds, what distance has he traveled in this time? A. 10,800 meters B. 200 meters C. 628 meters D. 314 meters ( The track has a diameter of 200m )

D. 314 meters

A billiard ball is rolling at a constant rate along a plane for 3 seconds. If it is moving in a straight line with an initial position of 8 meters and a final position of 20 meters, what is its velocity? A. 6.7 m/s B. 2.5 m/s C. 2.7 m/s D. 4 m/s

D. 4 m/s

A swing hangs motionless from a tree. Which of the following will definitely cause the swing to move in an inertial frame of reference? A. The tree applies a normal force on the ropes. B. The force of gravity acts on the swing. C. Nothing will cause the swing to move. D. A gust of wind blows on the swing.

D. A gust of wind blows on the swing.

What is the difference between distance and displacement? A. Displacement is a measurement of the total length of travel.Distance is a measurement of the length from the starting point. B. Distance can be measured using a meterstick or ruler.Displacement is measured with a stopwatch or clock. C. Distance and displacement measure the same lengths.These terms can be used interchangeably. D. Distance is a measurement of the total length of travel.Displacement is a measurement of the length from the starting point.

D. Distance is a measurement of the total length of travel.Displacement is a measurement of the length from the starting point.

A powerful storm attacks the coast, with winds blowing at 89 miles per hour. What is the velocity of these winds? A. 89 miles per hour B. 40 meters/second C. 89 miles per hour, northwest D. There is not enough information.

D. There is not enough information.

The rate of change in an object's velocity is the object's __________. A. force B. momentum C. speed D. acceleration

D. acceleration