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WorksheetsMomentum and Impulse
Total questions: 22
Worksheet time: 19mins
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 ______ N s.
-2.5
-10
-18
-45
A stunt person jumps from the roof of a tall building, but no injury occurs because the person lands on a large, air-filled bag. Which one of the following best describes why no injury occurs?
The bag reduces the impulse to the person
The bag increases the amount of time during which the momentum is changing and reduces the average force on the person
the bag decreases the amount of time during which the momentum is changing and reduces the average force on the person
The bag increases the amount of time the force acts on the person and reduces the change in momentum
A rubber ball and a clay ball both have the same mass. Both are thrown at a wall with equal speed. The rubber ball bounces off of the wall and the clay ball sticks to the wall. Which of the two receives the greater impulse from the wall?
Neither receives an impulse because the wall doesn’t move
The clay ball because it sticks
The rubber ball because it bounces
They receive equal impulses because they have equal momenta
Change in momentum is called:
Force
Impulse
Acceleration
Torque
SI unit of impulse is:
kgms−2
Ns
N
None of these
An impulse depends on
weight and force
force and time
electric charge and time
none of these
If the change of momentum of an object is 50kg m/s, we can say the impulse is equal to:
0 kg m/s
25 kg m/s
50 kg m/s
100 kg m/s
The air bag on a car reduces the force experienced by the driver, by extending the time of impact.
True
False
Which has the greatest momentum?
a 10 kg dog running at 15 m/s
a 25 kg wagon moving at 5 m/s
a 5 kg ball moving at 40 m/s
a 75 kg person standing still
