Question

find the KEof a ball of mass 250gram moving at the speed of 90km/h

Answer 1

Explanation:

Mass of the ball = m = 250g = 250/1000kg = 1/4kg

Speed at which the ball is moving = v = 90km/h = 25m/s

Formula to find KE = 1/2×mv² =  $\frac{1}{2}$×$\frac{1}{4}$×25² = $\frac{1}{2}$×$\frac{1}{4}$×25×25 = 78.125kg m²/s² = 78.125J (Ans)

Here is your answer. Hope it helps!