WorksheetsConservation of momentum Quiz 1
Total questions: 15
Worksheet time: 48mins
An external force _____ the total momentum of a closed system
changes
does not change
An internal force _____ the total momentum of a closed system
Changes
does not change
When the force of a club is external to the golfball, the momentum of the golfball
changes
does not change
When the force of a club is internal to the club-golfball system, the momentum of the club is transefered to the golfball so that total momentum before and after collision is the same.
True
False
The Law of Conservation of Momentum states that: in the absence of an external force or external impulse,
The net momentum of a closed systems remains unchanged or the momentum before collision is equal to momentum after 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.
If two people are standing on scateboards and are throwing football at each other, the distance between them will,
decrease over time
increase over time
Remain the same
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.
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.
Pick all of the scenarios that are explosions.
A cannon firing a cannon ball.
A spoon being shoved into a jar of peanut butter.
A linebacker tackling a member of the opposite team.
a pitcher throwing a football
two ice skaters push each other away.
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
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 after collision?
25 kgm/s
12.5 kgm/s
50 kgm/s
6.25 kgm/s
Since the two balls are equal in size, their speeds
remain the same
switches between the balls after collision
is both zero after collision
increases
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?
5.0 m/s
3.6 m/s
7.8 m/s
9.8 m/s
A man and a woman are standing on ice. If the man's mass is 80 kg and the woman's mass is 60 kg, how fast is the woman moving if the man moves backwards at 15 m/s after they push against each other?
30 m/s
15 m/s
20 m/s
25 m/s
