AQA GCSE Kinetic energy
Kinetic energy is the energy stored in a moving object.
Kinetic energy depends on mass of an object and the speed.
Kinetic energy, Ek = ½ x mass x speed2
Kinetic energy (Joules, J)
Mass (kilograms,kg)
Speed (m/s)
If mass increases, so will kinetic energy. They are directly proportional to each other.
Practice questions
1.A ball of mass 0.1kg is travelling at a speed of 6m/s. Calculate the kinetic energy
2. A toy car with a mass of 60g is moving at 2m/s. Calculate its kinetic energy
3. Calculate the mass of a cannon ball that has a kinetic energy of 60,000J and a velocity of 10m/s
4. Calculate the velocity of a car if it has a kinetic energy of 45000J and a mass of 700kg.
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