Question

Calculate the kinetic energy in joules of a ball of mass 40g moving at a velocity of 4ms-1

Answer 1

Answer

Step by step explanation

Answer 2

Answer:

1 kg = 1000g

1 g = 1/1000kg

So,

40g = 40/1000 = 4/100kg

Now

KE = 1/2×m×v²

= 1/2×4/100×4×4

= 32/100 = 0.32J