Agesti
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A car is travelling along a straight road. The driver suddenly observes that the road ahead is flooded and applies the brakes.

Describe what happens to the car and the brakes. Your answer should include details of braking distance and braking force.
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#Daisy
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The car will decelerate due to friction from the brakes.

The energy transferred by the breaking force will increase the temperature of the brakes and surroundings.

The braking distance of the car will depend on its kinetic energy, and so it depends on the square of its velocity. This means that if the velocity doubles, the braking distance is multiplied by 2 squared which is 4.

When a vehicle stops, the kinetic energy is transferred to other energy stores by the braking stores.

Useful equations:

kinetic energy = 0.5 x mass x speed squared

braking distance = work done/force
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