a force causes an object to move through a distance

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How do you work out the work done?

W = F * d

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What happens when work is done?

energy is transferred

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What is power and how do you work it out?

power is work done or energy transferred in a given time P = E/t

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What is gravitational potential energy and how do you work it out?

The energy that an object has by virtue of its position in a gravitational field E = m*g*h

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What does kinetic energy depend on?

It depends on its mass and its speed - E = 0.5 * m * v(SQUARED)

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What is momentum?

It is a property of moving objects - p = m * v

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What is the conservation of momentum?

In a closed system the total momentum before an event is equal to the total momentum after the event

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How do seat belts, crumple zones and air bags reduce the impact of a crash on humans?

seat belts - increase time taken for momentum to get to zero of a human, air bags - increase time taken for head's momentum to get to zero, crumple zones - increase time of impact so less energy is transferred.

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Other cards in this set

Card 2

Front

How do you work out the work done?

Back

W = F * d

Card 3

Front

What happens when work is done?

Back

Card 4

Front

What is power and how do you work it out?

Back

Card 5

Front

What is gravitational potential energy and how do you work it out?

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