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WorksheetsConservation of momentum TEST
Total questions: 30
Worksheet time: 1hrs 14mins
A(n) _________________ causes and is equal to a change in momentum
impulse
force
impact
collision
A 5 N force is applied to a 3 kg ball to change its velocity from +9 m/s to +3 m/s. The impulse on the ball is ________kgm2/s2.
18
-10
-18
-45
Not enough information
A 400 kg cannon fires a 10 kg cannonball at 20 m/sec. If the cannon is on wheels, at what velocity does it move backward?
8 kg
7 m/s
2 m/s
0.5 m/s
"Big" Al stands on a skateboard at rest and throws a 0.5 kg rock at a velocity of 10 m/s. "Big" Al moves back at 0.05 m/s. What is the combined mass of "Big" Al and the skateboard.
100.5 kg
100 kg
20.5 kg
85 kg
Select the best equation that would help solve the problem:
Ball A and Ball B have the same mass. Ball A rolls and collides with Ball B at rest. Ball A rolls with some velocity after the collision, what is the velocity of Ball B?
Δp = mv
p = mv
(before) mAvA + mBvB = mAvA + mBvB (after)
(before) mAvA + mBvB = (mA + mB)v (after)
Select the best equation that would help solve the problem:
An arrow collides and sticks with a target that is hanging on a string with negligible mass. To find the velocity of the arrow and target after the collision.
Δp = mv
p = mv
(before) mAvA + mBvB = mAvA + mBvB (after)
(before) mAvA + mBvB = (mA + mB)v (after)
Before the canon fires a cannon ball, both sit at rest. A person can confidently say the total momentum is...
zero
positive
negative
not known
The canon ball has a mass of m and the cannon has a mass of 100m. After the canon ball is fired from the canon, the greater acceleration is experienced by...
the canon due to its very low size
the canon due to its very large size
the canon ball due to its very low mass
the canon ball due to its very high mass
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, the combined speed of the two players just after the collision would be...
2 m/s
3.4 m/s
4.6 m/s
7.1 m/s
A 100 kg man is stuck, motionless, in the middle of a frictionless ice pond. Because it's cold, he's wearing a coat. He wants to get off the pond. Since he has studied physics and knows about conservation of momentum, he decides to throw his 2 kg coat. If he throws the coat at 25 m/s, what will his speed be?
0 m/s
0.5 m/s
2 m/s
25.5 m/s
50 m/s
When gymnasts vault over the horse and land, they land on a big pad. How does the pad help them?
It reduces the amount of momentum they have when they land
It reduces the change of momentum when they land.
It reduces the total impulse when they land.
It increases the time it takes to stop, so the force is less when they land.
It reduces their inertia when they land.
Two cars are driving down the street.
-The one traveling West has a momentum of 10,000 kgm/s.
-The one traveling East has a momentum of 20,000 kg×m/s.
-They crash (they always do in physics, ok!).
What is the total momentum after the crash?
0 kgm/s
10,000 kgm/s East
10,000 kg×m/s West
30,000 kg×m/s East
30,000 kg×m/s West
A particle's kinetic energy is zero. What is its momentum?
zero
1 kgm/s
positive
negative
After being struck by a bowling ball, a 1.5 kg bowling pin slides to the right at 3.0 m/s and collides head-on with another 1.5 kg bowling pin initially at rest. What is the final velocity of the second pin if the first pin moves to the right at 0.5 m/s after the collision?
2.5 m/s to the left
2.5 m/s to the right
3.0 m/s to the left
3.0 m/s to the right
After being struck by a bowling ball, a 1.5 kg bowling pin slides to the right at 3.0 m/s and collides head-on with another 1.5 kg bowling pin initially at rest. What is the final velocity of the second pin if the first pin stops moving after it hits the second pin?
2.5 m/s to the left
2.5 m/s to the right
3.0 m/s to the left
3.0 m/s to the right
Which equation expresses the law of conservation
of momentum?
A
B
C
D
The canon ball has a mass of m and the cannon has a mass of 100m. After the firing of the canon-canon ball system, the total momentum after the explosion is ____ compared to the total momentum before the explosion
greater than
less than
the same
A 3,000 kg truck moving at +10 m/s hits a 1,000 kg parked car which then moves off at +15 m/s. At what velocity does the truck move after the impact?
10 m/s
0 m/s
5 m/s
2 m/s
A 400 kg cannon fires a 10 kg cannonball at 20 m/s. If the cannon is on wheels, at what velocity does it move backward?
8 kg
7 m/s
2 m/s
0.5 m/s
Which has more momentum: a car stopped at a red light or a bike moving at 15 mph?
car
bike
they are equal
cannot determine using the info provided
