U6.2 – Impulse & Energy

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Impulse and Energy

1 / 10

A force of 35 N is exerted upon a 750 g mass for 3 seconds. Calculate the impulse.

2 / 10

An Audi A8 of mass 1920 kg car is dropped from a crane, accelerates to 24 ms-1 then hits the ground and comes to an instant halt. What impulse acts on the car when it crashes?

3 / 10

Minamoto no Tametomo fires an arrow of mass 0.152 kg horizontally at an coconut of mass 1.4 kg that is at rest, freely, on a wall. The arrow is travelling at 91 ms-1 just before it hits the coconut. Calculate the change in total kinetic energy of the arrow and coconut during the impact.

4 / 10

Select the best definition for a perfectly inelastic collision.

5 / 10

A rocket takes off from a stationary position and produces a force-time graph as shown above. Calculate the impulse produced by the rocket.

6 / 10

A big Tesco trolley of 31 kg is moving with speed 0.5 ms-1 as it is blown across a car park, until it hits a little Tesco trolley of 18 kg, which is at rest. They collide and end up stuck together. Calculate the impulse.

7 / 10

A rugby player is at training using a weighted training ball of mass 1.5 kg to improve her passing power. Calculate the force she needs to apply when she catches it from her team mate if the ball is travelling at 13.4 ms1 if the catch is complete in 0.08 s.

8 / 10

A crash test car of 1384 kg travels at a constant velocity. It crashes directly into a wall and the sensors onboard produce the force-time graph shown above. Estimate the impulse required to stop the car.

9 / 10

A cricket ball was bowled by Shoaib Akhtar, the fastest bowler ever. He throws the cricket ball of 163 g and, because he's having an off day, at the slow speed of 106 kmh-1 which strikes the bat, causing the ball to go back in the direction it came from at a speed of 85 kmh-1. The contact time was 0.09s. Calculate the average force exerted on the ball.

10 / 10

The Rock and The Terminator are running straight at each other. The Rock has a mass of 118 kg and he runs at 8 ms-1, where The Terminator is 19 kg lighter than The Rock, but he is a cyborg so can run at 21 ms-1. They collide and get stuck together. Calculate the loss of kinetic energy due to the impact.

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