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4th Six Weeks Physics Project
Test Description: What do you know about momentum?
Instructions: Answer all questions to get your test result.
1) 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
2) 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 down
B
5,000 kg·m/s to the right
C
5,000 kg·m/s to the left
D
5,000 kg·m/s up
3) 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 gained
C
The kinetic energy is lost
4) If the momentum of a ball is doubled, then the kinetic energy is
A
8x larger
B
4x larger
C
2x larger
D
0.5x larger
5) In any collision
A
total kinetic energy is conserved
B
total momentum is not conserved
C
total momentum is conserved
D
total momentum is not conserved but total kinetic energy is conserved
6) A heavy truck has more momentum than a passenger car moving at the same speed because the truck
A
is not streamlined
B
has a large wheelbase
C
has greater mass
D
has greater speed
7) A gun recoiling when it is fired is an example of
A
conservation of momentum
B
conservation of energy
C
none of the above
D
conservation of heat
8) A heavy object and a light object have the same momentum. Which has the greater speed?
A
light object
B
heavy object
C
both have same speed
9) Momentum is conserved
A
in an elastic collision of two balls
B
in the absence of an external force
C
in an inelastic collision of two balls
D
in all of the above
10) A change in momentum may result from
A
an impulse
B
a push or pull
C
all of the above
D
an acceleration
11) 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 momentum and decreases the force
B
It decreases the contact time which decreases the force
C
It increases the contact time which decreases the force
D
It increases his chances of getting knocked out
12) 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
none of the above
C
increases the impulse
D
increase contact time
13) 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
8x
C
4x
D
decreases by 2x
14) An example of an elastic collision is
A
When you throw clay a the wall and it sticks
B
When two atoms collide so violently that they explode
C
When 2 cars crash and get stuck
D
When two pool balls collide and fly off in different directions
15) When a falling object bounces as it hits the ground its a
A
explosion
B
elastic collision
C
inelastic collision
D
all of the above
16) A big fish swims up on and swallows a small fish at rest. The momentum of the big fish is
A
the same as before
B
a little more since it was a small fish
C
2x more
D
1.5x more
17) Which has greater momentum: a train at rest or a moving skateboard?
A
Train
B
The same momentum
C
Skateboard
18) What is momentum equation?
A
Momentum= mass x velocity
B
Momentum= mass + displacement/time
C
Momentum= force x distance
D
Momentum= time + displacement/2
19) Momentum is a _________ quantity
A
vector
B
scalar
20) 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 dad
B
at the same time
C
the boy
*select an answer for all questions
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