Energy: Kinetic Energy Flashcards
1
Q
What is kinetic energy?
A
The energy stored in moving objects is called kinetic energy.
2
Q
What is the formula to calculate kinetic energy?
A
Ek = ½ x m x v2
(kinetic energy (joules) = ½ x mass of object (kg) x speed of object squared (m/s))
3
Q
A car with a mass of 700 kg is moving with a speed of 20m/s. Calculate the kinetic energy of the car.
A
Ek = ½ x 700 x 202 =
140 000 J / 140 kJ
