Practice Question
1.When a force acts on an object, which can move, how will it affect the momentum of the object.
The force will cause a change in momentum
2. State Newton’s 2nd law
Force = mass x acceleration
3. State the formula that links acceleration to velocity
Acceleration = change in velocity/time
4. State the equation that links Force to change in momentum and time taken
Force = (mass x change in velocity)/time
5.A 0.2 kg tennis ball moving at 15 m/s is caught in 0.05 s. What is the average force exerted?
Force = (mass x change in velocity)/time
Mass = 0.2 kg
Change in velocity = 15-0 = 15m/s. 0 came from the fact that the ball was caught, so when caught its velocity is 0 m/s.
time = 0.05 seconds
Force = (0.2 x 15)/0.05
Force = 60N
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