kinetic energy

Question 1

What is kinetic energy?

Answer 1

it is the energy stored in moving objects

Question 2

Formula to find kinetic energy?

Answer 2

Ek = 0.5 x m x v(2)

0.5 multiply mass multiply speed squared (in m/s)

Question 3

a car with a mass of 700kg is moving with a speed of 20 m/s calculate the kinetic energy

Answer 3

Ek = 0.5  x m x v(2)
Ek = 0.5 x 700kg x 20(2) 
Ek = 140 000J - this is joules, and it is often converted into kilo joules which is done by dividing the result by 1000

Ek = 140KJ

Question 4

re arrange the kinetic energy formula = 0.5 x m x v(2) to find mass

Answer 4

m = Ek/0.5 x v(2)