Font size
WorksheetsMomentum Unit Assessment
Total questions: 45
Worksheet time: 1hrs 17mins
The Law of Conservation of Momentum states:
The total momentum before a collision is equal to the total momentum after a collision.
The total momentum before a collision is greater than the total momentum after a collision.
The total momentum before a collision is less than the total momentum after a collision.
The total momentum before a collision is not related to the total momentum after a collision.
According to Newton's Laws, for every action there is an ....
equal and opposite reaction.
equal and parallel reaction.
unequal and opposite reaction.
unequal and unrelated reaction.
Pick all of the scenarios below that are collisions.
A catcher catches a baseball.
A pitcher throws a baseball.
Two cars smash into each other.
Two students on roller skates push away from each other.
A bug smashes into a windshield.
A 2.5 kg ball moving at 5 m/s collides with another 2.5 kg ball that is at rest in a perfectly elastic collision. What is the total momentum of these two balls before collision?
25 kg m/s
12.5 kgm/s
50 kgm/s
6.25 kgm/s
A 10,000 kg railroad car traveling at a velocity of 6 m/s hits a stationary (at rest) boxcar that weighs 5600 kg. At what speed will the second boxcar move if the railroad car reduces its speed to 4.0 m/s after collision?
Assume that all railroad car and the boxcar move in the same direction after the collision.
5.0 m/s
3.6 m/s
7.8 m/s
9.8 m/s
A 3,000 kg truck moving at +10 m/s hits a 1,000 kg parked car which moves off at +15 m/s after the collision. What is the velocity of the truck after the collision?
10 m/s
0 m/s
5 m/s
2 m/s
Pick all of the scenarios that are explosions.
A cannon fires a cannon ball.
A spoon is shoved into a jar of peanut butter.
A linebacker tackles a member of the opposite team.
A swimmer jumps off a floating raft.
A figure skater throws a heavy ball.
Pick all of the scenarios below that are elastic collisions.
Two bouncy balls hitting each other.
A pitcher throws a baseball.
Two cars smash into each other and bounce off.
A bowling ball striking a pin
A bug smashes into a windshield.
A moving bomb explodes. Which equation correctly enforces the principle of conservation of momentum to determine the speed of fragment #2?
mv = m1v1' + m2v2'
m1v1 + m2v2 = m1v1' + m2v2'
m1v1 + m2v2 = mv'
m1v1 + m2v2 = m1v1 + m2v2
Two groups of canoeists meet in the middle of a lake. After a brief visit, a person in Canoe 1 (total mass 130 kg) pushes on Canoe 2 (total mass 250 kg). Canoe 2 moves away with a speed of 0.22 m/s. Which equation correctly enforces the principle of conservation of momentum to determine the speed of Canoe 1?
mv = m1v1' + m2v2'
m1v1 + m2v2 = m1v1' + m2v2'
m1v1 + m2v2 = mv'
m1v1 + m2v2 = m1v1 + m2v2
Two football players with mass 75 kg and 100 kg run directly toward each other with speeds of 6 m/s and 8 m/s respectively. If they grab each other as they collide, which equation correctly enforces the principle of conservation of momentum to determine the combined speed of the two players just after the collision?
mv = m1v1' + m2v2'
m1v1 + m2v2 = m1v1' + m2v2'
m1v1 + m2v2 = mv'
m1v1 + m2v2 = m1v1 + m2v2
What is the SI unit for momentum?
g m/s
kg m/s
m/s
kg/s
What is the symbol for momentum?
p
m
M
mo
A 5.0 kg mass has a velocity change from 8.0 m/s east to 2.0 m/s east. Find the object's change in momentum.
-30 kg m/s west
10 kg m/s west
-40 kg m/s west
-16 kg m/s west
Which has a greater momentum: a dump truck full of bricks parked on the side of the street or a cat walking on the sidewalk?
the cat
the dump truck full of bricks
both the cat and dump truck have the same momentum
there is not enough information to determine this
Due to the difficulty of stopping an oil tanker, the engines are cut off around 25 km from port. Why are these oil tankers difficult to stop?
The oil tanker has a huge mass which results in an enormous momentum. The vessel needs a long distance to decrease its velocity.
The oil tanker has a small mass which results in an enormous momentum. The vessel needs a long distance to decrease its velocity.
The oil tanker has a huge mass which results in a small momentum. The vessel needs a long distance to decrease its velocity.
The oil tanker has a huge mass which results in an enormous momentum. The vessel needs a long distance to increase its velocity.
What is the formula for momentum?
Distance/ Speed = Momentum
Mass x Speed = Momentum
Mass x Velocity = Momentum
The Law of Conservation states: Without an ____ momentum of a system remains ____.
internal force; the same
external force; unchanged
internal force; unchanged
external force; the same
in the equation (p) = (m) x (v)
what does each letter stand for
p = momentum, m = mass, v = vector
p = mass, m = momentum, v= velocity
p = momentum, m = mass, v = velocity
Calculate the impulse on the ball.
When a ball is hit by a bat, it experiences a force of 3,000 N for 0.003 seconds. What is the impulse experienced by the ball?
9 N.s
9,000 N.s
1,000 N.s
1,000,000 N.s
A car moves forward with an initial momentum of 320 kg.m/s when it receives an impulse of 160 N.s as the driver presses the gas pedal. What is the final momentum of the car?
0 kg.m/s
160 kg.m/s
-160 kg.m/s
480 kg.m/s
Two skateboarders stand motionless across from one another until skateboarder A (whose mass is 40 kg) pushes skateboarder B (whose mass is 60 kg). After the push, skateboarder B moves to the right at 2 m/s. What is the velocity of skateboarder A?
. 3 m/s to the left
.2 m/s to the left
.1 m/s to the left
. 3 m/s to the right
Impulse is equal to
"force " X "duration time of the impact"
"mass" X " acceleration"
"mass" X "velocity"
None of the above
Airbags are use din cars because they
increase the force the driver experience
decrease the change in momentum
decrease the impulse
increase the duration time of impact
When two objects collide or explode, they experience
the same force for the same amount of time.
different forces for different amounts of time.
different forces for the same amount of time.
the same force for different amounts of time.
When two objects collide or explode, they experience
the same impulse causing the same change in momentum.
different impulses causing different changes in momentum.
different impulses causing the same change in momentum.
the same impulse causing different changes in momentum.
.
.
If the clown's speed is 15 m/s after the cannon fires, then the recoil (v) of the cannon is (a) m/s.
Which two quantities have equivalent units?
energy and force
momentum and energy
impulse and force
impulse and momentum
Superman is at rest in space when he throws an asteroid that has more mass than he does. Which moves faster, Superman or the asteroid?
the asteroid
Superman
they both move at the same speed
