Estimating Braking Force (AQA GCSE Physics): Quizzes

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Estimating Braking Force
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What energy transfer occurs when brakes are applied to slow down a vehicle?

Kinetic to thermal energy

What happens to the temperature of the brakes when they are applied?

Temperature increases

What force between the brake pads and wheels slows the vehicle down?

Friction

Why does a faster vehicle require more work done to stop?

It has more kinetic energy

What is the relationship between braking force and deceleration?

Greater force = greater deceleration

Why are large decelerations dangerous for vehicle control?

Vehicle could lose control

What can happen to brakes during large decelerations?

They could overheat

Which equation is used to calculate acceleration assuming it is uniform?

v2=u2+2asv^2 = u^2 + 2as

A vehicle decelerates from 25 m/s to 0 m/s in 50 m. Calculate acceleration using a=v2−u22sa=\frac{v^2-u^2}{2s}

−6.25-6.25 m/s²

A 30000 kg truck decelerates at −6.25-6.25 m/s². Calculate braking force using F=maF = ma

−187500-187500 N

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