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Category 2

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Category 3

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Category 4

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Category 5

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Category 1 questions follow

Questio

nIf 2 cars collide after rolling towards each other,

both with the same mass and speed, what is

their combined momentum after they meet?

10Category 1

Answ

er

If 2 cars collide after rolling towards each other,

both with the same mass and speed, what is their

combined momentum after they meet?

Remember m1v1 = m2v2

The resultant momentum = 0

10Category 1

Questio

nWhat fairly safety method can you use to produce a

higher velocity when shooting a clown out of a cannon?

20Category 1

Answ

er

What fairly safety method can you use to produce a

higher velocity when shooting a clown out of a cannon

FT = mv

Without increasing the force, and the clown having the

same mass, the longer the barrel, the greater the

velocity

20Category 1

Questio

nYou are in a 200 kg car going 50 km/hr. Which of the

following will produce the least amount of force on

impact?

a. Hitting an immovable brick wall

b. Hitting car head on which is 100 kg moving 200 km/hr

30Category 1

Answ

er

You are in a 200 kg car going 50 km/hr. Which of the

following will produce the least amount of force on

impact? MV= 10 000

a. Hitting an immovable brick wall (same as original)

b. Hitting car head on which is 100 kg moving 200 km/hr

MV = 20 000

30Category 1

Questio

nCompare the force of a raindrop on the ground that hits

the ground and bounces up to one which simple hits and

lays on the ground. (which has the greatest force?

40Category 1

Answ

er

Compare the force of a raindrop on the ground that hits

the ground and bounces up to one which simple hits

and lays on the ground. (which has the greatest force?

a. A drop of water that bounces up indicates that it has

more momentum than one which simply fell.

40Category 1

Questio

nIf you are on a frictionless boat on a lake with no

friction, what would move you to the right edge the

fastest?

a. Blow in and out in one direction

b. Throwing a 2 kg boot to the right

c. Throw a 1 kg baseball to the left

50Category 1

Answ

er

If you are on a frictionless boat on a lake with no

friction, what would move you to the right edge the

fastest?

a. Blow in and out in one direction

b. Throwing a 2 kg boot to the right

c. Throw a 1 kg baseball to the left- (for every action

there is an opposite and equal reaction)

50Category 1

Category 2 questions follow

Questio

nAn astronaut is floating in space and needs to get back to the ship. He

throws a wrench is the direction opposite of where he wants to go. He

will move___

a. Away from the ship at the same velocity as the wrench is moving

b. Toward the ship at the same velocity as the wrench is moving

c. Toward the ship at a slower velocity than the wrench is moving

d. Toward the ship at a faster velocity than the wrench is moving

10Category 2

Answ

er

An astronaut is floating in space and needs to get back to the ship.

He throws a wrench is the direction opposite of where he wants to

go. He will move___

a. Away from the ship at the same velocity as the wrench is moving

b. Toward the ship at the same velocity as the wrench is moving

c. Toward the ship at a slower velocity than the wrench is moving

** opposite and equal (mv = mv)

d. Toward the ship at a faster velocity than the wrench is moving

10Category 2

Questio

nA bike is traveling with a constant speed down hill at

the same rate as a bus which has 10 times its mass.

a. They have the same momentum

b. They have the same force of impact if the hit a wall

at the bottom

c. They both have zero acceleration

20

Answ

er

A bike is traveling with a constant speed down hill at

the same rate as a bus which has 10 times its mass.

a. They have the same momentum

b. They have the same force of impact if the hit a wall

at the bottom

c. They both have zero acceleration

20Category 2

Questio

nDescribe how these factors affect the amount of force

that a ball hits the ground with

a. Its speed on impact

b. The length of impact with the ground (did it hit

concrete or dirt)

c. If it bounced

30Category 2

Answ

er

Describe how these factors affect the amount of force

that a ball hits the ground with

a. Its speed on impact- higher speed = more force

b. The length of impact with the ground (did it hit

concrete or dirt)- the longer the impact, the less

the force

c. If it bounced- bouncing indicates more force than

laying still

30Category 2

Questio

nWhat do the following have in common?

a. Children wear helmets when riding bikes

b. Play ground equipment have rubber mats

underneath

c. Jumping with your knees bent

40Category 2

Answ

er

What do the following have in common?

a. Children wear helmets when riding bikes

b. Play ground equipment have rubber mats underneath

c. Jumping with your knees bent

They all decrease force by increasing the time of impact

40Category 2

Questio

nWhat is the reaction force to the following action forces?

a. Tires on the road

b. Rocket exhaust

c. Walking on the floor

d. The pull of the earth on you-

e. The boxer hits a bag

50Category 2

Answ

er

What is the reaction force to the following action forces?

EQUAL AND OPPOSITE FORCES

a. Tires on the road- road pushing up against tire

b. Rocket exhaust- rocket moves forward

c. Walking on the floor- floor pushes up on feet

d. The pull of the earth on you- the pull of you on the earth

e. The boxer hits a bag- the bag hits the glove

50Category 2

Category 3 questions follow

Questio

nA car with a momentum of 40 kg m/s and a mass of20

meters will have a speed of __________

10Category 3

Answ

er

A car with a momentum of 40 kg m/s and a mass of20

kg will have a speed of __________

P = mv or momentum = mass (velocity)

So

40 kgm/s = 20 kg (v)

2 m/s = V

10Category 3

Questio

nZero acceleration occurs when an object is

a. At constant velocity

b. In mechanical equilibrium

c. At rest

d. At terminal velocity

e. All of these

20Category 3

Answ

er

Zero acceleration occurs when an object is

a. At constant velocity

b. In mechanical equilibrium

c. At rest

d. At terminal velocity

e. All of these

Acceleration occurs only when there is a change in speed

or direction

20Category 3

Questio

nYour Weight

a. Is dependent on ___________

a. Is a unit of _______________ called Newtons

30Category 3

Answ

er

Your Weight

a. Is dependent on _the grativational attraction on you

a. Is a unit of _force___ called Newtons

30Category 3

Questio

nThe force on a sky diver is dependent on

a. Size of person

b. Speed of object

c. Both of these

40Category 3

Answ

er

The force on a sky diver is dependent on

a. Size of person

b. Speed of object

c. Both of these

40Category 3

Questio

nAn object that has a mass of 50 kg has a weight of

a. About 500 N

b. About 5 N

c. About 50 kg

50Category 3

Answ

er

An object that has a mass of 50 kg has a weight of

a. About 500 N

b. About 5 N

c. About 50 kg

d. W = mg so Wt = 50 kg (10 m/s2) = 500 N

50Category 3

Category 4 questions follow

Questio

nA force of 50 N is needed to move a box at 10 m/s.

What is its mass?

10Category 4

Answ

er

A force of 50 N is needed to move a box at 10

m/s. What is its mass?

F = ma

50 N = 50 kg m/s2

50 kg m/s2 = m (10m/s2)

5 kg

10Category 4

Questio

nThe bug which hits the windshield always exerts

a. Less force than the windshield

b. More force than the windshield

c. The same force than the windshield

20Category 4

Answ

er

The bug which hits the windshield always exerts

a. Less force than the windshield

b. More force than the windshield

c. The same force than the windshield

20Category 4

Questio

nA train with 2 cars runs head on into a train with only 1

car, with all the cars having the same mass

a. Which has a greater change in momentum?

30Category 4

Answ

er

A train with 2 cars runs head on into a train with only 1

car, with all the cars having the same mass

a. Which has a greater change in momentum?

b. The train with only 1 car changes momentum faster

30Category 4

Questio

nA train with 2 cars runs head on into a train with only 1

car, with all the cars having the same mass

a. Which hit with the most force?

40Category 4

Answ

er

A train with 2 cars runs head on into a train with only 1

car, with all the cars having the same mass

a. Which hit with the most force?

Remember- For every reaction there is an opposite but

equal reaction- they hit with the same force

40Category 4

Questio

nWhy would a small gun firing a large bullet be a hazard?

50Category 4

Answ

er

Why would a small gun firing a large bullet be a hazard?

Because there may be more force going backward than

forward

M1v1 = m2v2

50Category 4

Category 5 questions follow

Questio

nCompare a 1 kg mass moving 10 m/s to a 2 kg mass

traveling at the same speed.

10Category 5

Answ

er

Compare a 1 kg mass moving 10 m/s to a 2 kg mass

traveling at the same speed.

If you double the mass, the momentum is doubled

(directly proportional)

10Category 5

Questio

nWeight

a. Is A gravitational attraction

b. Is Measured in kilograms

c. Never changes

20Category 5

Answ

er

Weight

a. Is A gravitational attraction

b. Is Measured in kilograms

c. Never changes

20Category 5

Questio

nIf you are on a planet which has 3 times the mass as

earth, your mass would be

a. 1/3 as large

b. 3 times as large

c. The same

30Category 5

Answ

er

If you are on a planet which has 3 times the mass as

earth, your mass would be

a. 1/3 as large

b. 3 times as large

c. The same- mass does not change

30Category 5

Questio

nIf you are on a planet which has 3 times the mass as

earth, your weight would be

a. 1/3 as large

b. 3 times as large

c. The same

40Category 5

Answ

er

If you are on a planet which has 3 times the mass

as earth, your weight would be

a. 1/3 as large

b. 3 times as large

c. The same

40Category 5

Questio

nCompare the amount of friction force on a motorcycle

with 2 wheels versus a small car with 4 wheels, if the

masses are the same.

50Category 5

Answ

er

Compare the amount of friction force on a motorcycle

with 2 wheels versus a small car with 4 wheels, if the

masses are the same.The total amount of force downward is the same, each tire on the motor cycle would have less surface area, but would have more mass/weight pushing downward.

50Category 5