MOTION and FORCES (quarter 3)

How far can a person run in 15 minutes if he or she runs at an average speed of 16 km/h?

4.0 km

A snail can move approximately 0.30 meters per minute. How man meters can the snail cover in 15 minutes?

4.5 m

How much time would it take for the sound of thunder to travel 1500 meters if sound travels at a speed of 330 m/s?

4.5s

A vehicle travels 2345 m in 315 s toward the evening sun. What is its speed?

7.44 m/s

A car traveling at a speed of 30.0 m/sec encounters an emergency and comes to a complete stop. How much time will it take for the car to stop if its rate of deceleration is -4.0 m/s2?

7.5s

The cheetah which is the fastest land mammal can accelerate from 0.0 mph to 70 mph in 3.0 seconds. What is the acceleration of the cheetah? Give answer in mph/s.

23 mph/s

The Lamborghini Diablo sports car can accelerate from 0.0 km/h to 99.2 km/h in 4.0 seconds. What is the acceleration of this car? Give answer in units of kph/s.

25 km/s

A baseball is thrown a distance of 18m. What is its speed if it takes 0.5 seconds to cover the distance?

36 m/s

10.42 m/s

Apollo Anton from the US skated in the 1500m Short Track race in 144 seconds. Calculate his speed in m/s.

Free Fall Motion

any motion of an object where the only force being applied to the mass of the object is gravity(only in a vacuum)

While traveling along a highway a driver slows from 24 m/s to 15 m/s in 12 seconds. What is the automobile's acceleration?

-0.75 m/s/s

A parachute on a racing dragster opens and changes the speed of the car from 85 m/s to 45 m/s in a period of 4.5 seconds. What is the acceleration of the dragster?

-8.9 m/s/s

Vertical motion of a projectile

1. Force = Weight (the pull of gravity acting on the object) 2. Acceleration = -9.8 m/s/s 3. Velocity changes 9.8 m/s per second

Horizontal motion of a projectile

1. Force = none 2. Acceleration = none 3. Velocity is constant due to inertia

Examples of projectiles

1. an object dropped from rest 2. an object thrown vertically upwards 3. an object thrown upward at an angle

How much time does it take a person to walk 12 km north at a velocity of 6.5 km/h?

1.8 hrs

Suppose you ride your bicycle to the library traveling at 0.5 km/min. It takes you 25 minutes to get to the library. How far did you travel?

12.5 km

A baseball is thrown a distance of 60 feet. What is its speed if it takes 0.5 seconds to cover the distance?

120 ft/s

What distance will a car traveling 65 km/hr travel in 180 min?

195 km

Jose wandered 4 kilometers at 2 kilometers per hour. How long did Jose wander?

2 hours

A cyclist accelerates from 0 m/s to 8 m/s in 3 seconds. What is his acceleration? Is this acceleration higher than that of a car which accelerates from 0 to 30 m/s in 8 seconds?

2.67 m/s/s

A skater increases her velocity from 2.0 m/s to 10.0 m/s in 3.0 seconds. What is the skater's acceleration?

2.7 m/s/s

A cart rolling down an incline for 5.0 seconds has an acceleration of 4.0 m/s/s. If the cart has a beginning speed of 2.0 m/s, what is its final speed?

22 m/s

How much time does it take for a bird flying at a speed of 45 miles per hour to travel a distance of 1, 800 miles?

40 hrs

You ride your bike for a distance of 30 km. You travel at a speed of 0.75 km/minute. How many minutes does this take?

40 min

How long will it take to travel 200 km traveling 10 m/s?

5.55 hours

How much time would it take for an airplane to reach its destination if it traveled at an average speed of 790 km/h for a distance of 4700 km?

5.9h

What is the average speed of car that traveled 300.0 miles in 5.5 hours?

55 mph

A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its average acceleration?

6 m/s/s

What distance will be traveled if you are going 120km/hr for 30 min?

60 km

A helicopter's speed increases from 25 m/s to 60 m/s in 5 seconds. What is the acceleration of this helicopter?

7 m/s/s

An airplane travels 3,260 km in 4 hours. What is the airplane's average speed?

815 km/h

If a car can go from 0.0 to 60 mph in 8.0 seconds, what would be its final speed after 5.0 seconds if its starting speed were 50 mph?

88 mph

A train travels 225 kilometers in 2.5 hours. What is the train's average speed?

90 km/h

You drive a car from Milwaukee to Chicago which is a distance of 150km and it takes you 95 min. What is its velocity in km/hr?

95 km/hr

9 kg

A bicycle has a momentum of 36 kg • m/s and a velocity of 4 m/s. What is the mass of the bicycle?

The pin pushes the bowling ball toward the left

A bowling ball collides with a pin and pushes the pin toward the right. Which describes the reaction force

40,000 kg m/s

A car has a momentum of 20,000 kg • m/s. What would the car's momentum be if its velocity doubles?

15,960 m

A city bus travels at a speed of 13.3 m/s. How far would you travel in 1200 seconds?

2,200 m

A race car driver travels at 110 m/s for 20 seconds. How far has the driver traveled?

5 km North

Aaron runs 7km north, 4km south, and 2 km north. What is his displacement?

action force and reaction force

According to Newton's third law of motion, which are equal?

1000 m

Amelia can run at a rate of 4 m/s for 250 seconds. How far does she travel in that time?

280 miles

Amelia drives her car at a constant rate for 4 hours at 70 miles per hour. How far did she travel?

It's mass

Anya knows the velocity of an object. What else does she need to know in order to find the object's momentum

Southeast

Benji walks 4 meters south and 3 meters east. What is the direction of his displacement?

116.24 m

Billy is driving his new Lamborghini he is driving at 58.12 m/s (130 miles per hour). He looks down for 2 seconds to check his phone. How far did his car travel while he was looking down?

6.67 m/s

Bobby can run a 100 m sprint in 15 seconds. How fast can Bobby run?

A car travels 240 km in 2.0 hrs and a sprinter travels a 100 m in 9.5 s. Which is traveling faster the car or the sprinter?

Car

78.25 miles/ hour

Danielle drives her car from Columbia to Jefferson City at a constant speed. She takes 0.4 hours to travel 31.3 miles. Calculate her speed in miles/hour.

Displacement

Distance and direction of an object's change in position from the starting point.

25 min

Erika swims 1 mile during swim practice. If she swam at 0.04 miles per minute. How long did she swim for (in minutes)?

0 km

Glenn runs 4 laps around a .5km track. What is his displacement?

horizontal

Going straight across from side to side

Independent components

Horizontal and vertical components of a projectile have NOTHING to do with each other.

hang time / flight time

How much time a projectile spends in the air

10.27 miles/hr

If you planned to bike to a park that was 15.4 miles away, what speed would you have to keep up to arrive in 1.5 hours? In miles per hour.

12.5 m

If your response time is 0.5 seconds and your car is traveling 25 m/s, how far does your car travel in your response time?

7.20 m/s

In 2014, Sochi Olympics Ola Vigen Hattestad won the gold in Cross Country Skiing for Norway. If he sprinted 1.5 km (1500 m) in 208.35 seconds. How fast was he skiing?

10.15 m/s

In the 2004 Olympics, Justin Gatlin ran the 100 m race in 9.85 seconds. How fast did he run?

10.11 m/s

In the 2004 Olympics, Shawn Crawford ran 200m in 19.79 sec. How fast did he run?

mass

Jerome solves a problem using the law of conservation of momentum. What should Jerome always keep constant for each object after the objects collide and bounce apart?

1.56 m/s

Kara swims a 100 m freestyle in 64 seconds. How fast was she swimming?

100 seconds

Liza wants to run 300 m at a rate of 3 m/s. How long will it take her to run the 300 m?

0.33 hours

Lucy wants to know how long it would take her to get to Simonsen. She lives 10 miles away. If her mom drives 30 miles per hour the entire trip, how long in hours will it take her to get to school.

2.01 m/s

Michael Phelps holds the world record for the 100m butterfly at 49.82 seconds. How fast was he swimming when he set that record?

It is equal to the momentum of object 1 plus the momentum of object 2.

Objects 1 and 2 collide and stick together. Which best describes the momentum of the resulting single object?

1,500

The chart show the masses and velocities of two colliding objects that stick together after a collision. According to the law of conservation of momentum, the momentum of the object after the collision is ____ kg • m/s.

Y, W, X, Z

The chart shows masses and velocities of four objects. Which lists the objects in order, from least to greatest momentum?

Horizontal velocity of a projectile

The component of velocity that remains constant for projectile motion, and is not affected by gravity.

terminal velcoity

The constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the force of gravity

33.99 seconds

Pavel Kulizhnikov currently holds the speed skating world records for the 500 m. If his average speed was 14.71 m/s, how long in seconds did it take him to complete the race?

53.33 miles/hr

Rita drives her car from Columbia to Kansas City at a constant speed. She takes 2.25 hours to travel 120 miles. Calculate her speed in miles/hr.

In the absence of gravity and air, what happens to a cannon ball after it leaves the cannon?

Straight line motion in the same speed and direction.

0.013 m/s

Susan the snail is that fastest snail in the world. She can crawl 100 m in 7692 seconds. How fast does she crawl?

26.25 min

Tammie rides her bike in Oakland Park. She rides for 3.5 miles at a speed of 8.00 mi/hr. How long does it take Tammie to finish her ride (in minutes)?

672,000 km

The Space Shuttle travels for 420 hours. If it travels at an average speed of 16 km/hr, how far did it travel?

Z

The chart lists the masses and velocities of four objects. Which object requires the greatest change in momentum in order to stop its motion?

The red ball has a greater velocity than the purple ball

The chart lists the masses of four balls that have the same momentum. Which correctly compares two of the balls?

Parabola

The curved path that an object follows when thrown, launched, or otherwise projected near the surface of the Earth.

0.2 kg m/s

The diagram shows two balls before they collide. What is the momentum of the system after the collision?

air reistance

The frictional force that opposes motion through the earth

Range

The horizontal distance traveled by a projectile

Remains the same

The law of conservation of momentum states that, if left alone, the total momentum of two interacting objects that make up a system .

Gravity

The only force acting on a projectile

trajectory

The parabolic path of a projectile through the air.

Vertical Velocity

The velocity component that changes by 9.8 m/s each second due to gravity.

4 kg m/s

Two carts collide and bounce apart. Cart 1 had a momentum of -6 kg • m/s before the collision. Cart 2 had a momentum of 10 kg • m/s before the collision. What is the total momentum of the carts after the collision?

6.0 kg m/s

What is the momentum of a 5 kg object that has a velocity of 1.2 m/s?

The ball pushing the person

When someone throws a ball, the action force is the person pushing on the ball. What is the reaction force?

p initial = p final

Which formula can be used to express the law of conservation of momentum, where p = momentum?

680,000 km

While in orbit, the speed of the Space Shuttle is about 27,200 km/h. At this speed, how far can the Space Shuttle travel in 25 hours.

same rate

neglecting air resistance all objects fall at the _________ _______

Vertical

straight up and down

launch angle

the angle that a projectile's initial path makes with the launch surface.

projectile motion

the curved path that an object follows when thrown, launched, or otherwise projected near the surface of Earth

stays constant

the horizontal velocity of a projectile always...

90 degrees

when launching a projectile from level ground the angle that will result in longest air time.

45 degrees

when launching a projectile from level ground the angle that will result in max range is...

zero

you throw a ball straight up when it reaches the top of its path the ball's speed is...