The slower an object moves the more kinetic energy it has.

True

False

True the friction will continuously move the more of kinetic energy also.

False, because its backwards

There will be more energy 'locked away' in a massive lorry that is moving at 20 m/s than in a motorbike travelling at the same speed.

Also the faster it goes the more kinetic energy the lorry will have.

A lorry moving at high speed will have much more kinetic energy than a lorry moving at low speed.

Therefore a fast moving car or lorry will cause more damage in an accident than a slow moving one because this kinetic energy has to be turned into other forms including sound, heat and stress on the other vehicles.

The kinetic energy of an object therefore depends on two things:

(a) the mass of the object (m)

(b) its speed (v)

The formula for kinetic energy of an object of mass m travelling at speed v is:

Kinetic energy (k. e) = 練v 2