4th Six Weeks Physics Project Question Preview (ID: 35693)


What Do You Know About Momentum? TEACHERS: click here for quick copy question ID numbers.

What is momentum?
a) refers to the quantity of motion that an object has
b) the ability to do work or to cause change
c) energy which is moved between two things when one of them is hotter than the other
d)

What is the momentum of the cannon after firing a cannon ball with an initial momentum of 5,000 kg·m/s to the right?
a) 5,000 kg·m/s to the right
b) 5,000 kg·m/s to the left
c) 5,000 kg·m/s up
d) 5,000 kg·m/s down

When two objects collide elastically the momentum is conserved. Which of the following is true about the kinetic energy during the collision?
a) The kinetic energy is conserved
b) The kinetic energy is lost
c) The kinetic energy is gained
d)

If the momentum of a ball is doubled, then the kinetic energy is
a) 0.5x larger
b) 2x larger
c) 4x larger
d) 8x larger

In any collision
a) total momentum is conserved
b) total kinetic energy is conserved
c) total momentum is not conserved
d) total momentum is not conserved but total kinetic energy is conserved

A heavy truck has more momentum than a passenger car moving at the same speed because the truck
a) has greater mass
b) has greater speed
c) is not streamlined
d) has a large wheelbase

A gun recoiling when it is fired is an example of
a) conservation of heat
b) conservation of energy
c) conservation of momentum
d) none of the above

A heavy object and a light object have the same momentum. Which has the greater speed?
a) heavy object
b) light object
c) both have same speed
d)

Momentum is conserved
a) in an elastic collision of two balls
b) in an inelastic collision of two balls
c) in the absence of an external force
d) in all of the above

A change in momentum may result from
a) an acceleration
b) an impulse
c) a push or pull
d) all of the above

A boxer learns to move his head backward when he sees he is going to receive a hit to the head. What does this accomplish?
a) It increases the contact time which decreases the force
b) It increases the momentum and decreases the force
c) It decreases the contact time which decreases the force
d) It increases his chances of getting knocked out

If someone throws a hard baseball at you, a way to decrease the 'sting' from catching it you can usually
a) catch it with stiff hands and locked elbows
b) increase contact time
c) increases the impulse
d) none of the above

A biker traveling at a speed of 40 km/hr increases their speed to 80 km/hr. As a result its kinetic increases
a) 2x
b) 4x
c) 8x
d) decreases by 2x

An example of an elastic collision is
a) When two atoms collide so violently that they explode
b) When 2 cars crash and get stuck
c) When two pool balls collide and fly off in different directions
d) When you throw clay a the wall and it sticks

When a falling object bounces as it hits the ground its a
a) inelastic collision
b) explosion
c) elastic collision
d) all of the above

A big fish swims up on and swallows a small fish at rest. The momentum of the big fish is
a) 2x more
b) 1.5x more
c) the same as before
d) a little more since it was a small fish

Which has greater momentum: a train at rest or a moving skateboard?
a) Train
b) Skateboard
c) The same momentum
d)

What is momentum equation?
a) Momentum= mass x velocity
b) Momentum= force x distance
c) Momentum= time + displacement/2
d) Momentum= mass + displacement/time

Momentum is a _________ quantity
a) scalar
b) vector
c)
d)

A boy and his dad both 50 kg, are stuck in the middle of a frozen lake with no friction, the boy pushes his dad to the edge of the lake, who will get to the shore first?
a) the boy
b) the dad
c) at the same time
d)

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