Question

A moving body of mass 2 kg has 400j kinetic energy.find its speed??​

Answer 1

Explanation:

KE=1/2 mv^2

Given

KE=400J

m=2Kg

V=?

$400 = \frac{1}{2} \times 2 \times {v}^{2}$

$v = \sqrt{400} \\ v = 20m {s}^{ - 1}$