Object Motion

What is the total distance that Mr. Watson travels every day?

41 KM

How long would it take a car to accelerate from 10 mph to 75 mph if its acceleration is 10 mph/s?

6.5

What total distance will be covered by traveling at 40 mph for 105 minutes?

70

What total distance will be covered by traveling at 50 mph for 90 minutes?

75 miles

What total distance will be covered by traveling at 40 mph for 120 minutes?

80 miles

What total distance will be covered by traveling at 50 mph for 105 minutes?

87.5 miles

What is the final velocity of an object that starts at 30 mph and accelerates at a rate of -10 mph/sec for 3 seconds?

0 Mph

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?

0 miles

Consider the above graph of the horizontal velocity of a UFO over 30 s. The velocity peaks at 72.5 m/s after 14.5 s. Over the next 1.0 s, its velocity drops to -72.5 m/s. It then continues on with the same acceleration that it had before it changed direction. What is the UFO's net displacement after these 30 s of movement?

0.0

What is the final velocity of an object that starts at 60 mph and accelerates at a rate of -5 mph/sec for 5 seconds?

35 MP

If Grant starts at one end of the pool and swims 3 3/4 laps before stopping, his distance traveled is _______ and his displacement is _______.

375 meters; 25 meters to the right of his starting location

What is the final velocity of an object that starts at 60 mph and accelerates at a rate of -5 mph/sec for 4 seconds?

40 mph

How long would it take a car to accelerate from 20 mph to 45 mph if its acceleration is 20 mph/s?

1.25

How long would it take to travel 90 miles at a speed of 60 mph?

1.5 hours

A man with a rocket strapped to his back travels 32 kilometers in 20 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 20 seconds of flight?

1.6 Km

What is Mr. Watson's displacement when the bus is parked at the Maple Leaf apartment complex?

12 Km

How long would it take to travel 160 miles at a speed of 80 mph?

2 hours

A man with a rocket strapped to his back travels 43 kilometers in 18 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 18 seconds of flight?

2.4 km/s

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?

20 km

Two sisters decide to measure how quickly their pet hamster can run. The sisters mark out a start and finish line and measure how long it takes the hamster to get from one to the other. The graph below shows the hamster's displacement from the start line as a function of time. At the end of the graph, what is the hamster's net displacement from his position at t = 0?

25m

A man with a rocket strapped to his back travels 45 kilometers in 15 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 15 seconds of flight?

3 km/s

How long would it take a car to accelerate from 15 mph to 75 mph if its acceleration is 20 mph/s?

3 seconds

How long would it take a car to accelerate from 10 mph to 75 mph if its acceleration is 20 mph/s?

3. 25

During Trip's trials for observing the movement of a marble down a tube, he calculated the velocity of the marble and graphed it.

3/2 m/s/s

Alexandra observed a battery-driven car to find out how fast it can travel in a span of 20 seconds. A graph of the positions and times of the car is shown below. What is the average velocity of the car?

3/5

What is the final velocity of an object that starts at 45 mph and accelerates at a rate of -5 mph/sec for 3 seconds?

30 MPH

Above are two velocity vs. time graphs that Stephen drew during physics lab. What could Stephen say about the two graphs when writing his report?

The graph on the left shows constant accleration, whereas the graph on the right shows changing acceleration.

What is the difference between distance and displacement?

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

Scalar quantities describe only the magnitudes of measurements, whereas vector quantities describe the magnitudes and directions of measurements. I. acceleration II. force III. length IV. mass V. speed VI. velocity

III, IV and V only

How are scalar quantities different from vector quantities?

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

Hector drives his car to school every day. Which of the following is an example of a vector quantity that his car might have?

The car is 200 meters north of school.

All motion is relative to a frame of reference. What is the frame of reference for a sunset?

The earth

What is happening in the graph shown below?

The object moves away from the origin at a speed of 3 m/s, stands still 6 m away from the origin for 3 seconds, then moves toward the origin at a speed of 2 m/s.

Which of the following shows correct definitions of the slope and y-intercepts of the position vs. time graph shown below?

The slope is equal to the average velocity, and the y-intercept is the initial position.

A powerful storm attacks the coast, with winds blowing at 89 miles per hour. What is the velocity of these winds?

There is not enough information.

Which of the following graphs represents constant velocity as the rate of change of position?

X.

A maple leaf falls from a tree branch. From whose reference point is the leaf moving away from the observer?

a bird perched on the top of the tree

The equation of the line in Arnold's graph is y = 2/3x + 1. What does the slope of the line represent?

acceleration

A position vs. time graph is shown below.

constant average velocity

A ball is dropped from a tower. From whose reference point is the ball approaching the observer?

person standing on the ground

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?

south