Question

A moving body of mass 0.3kg has 60J of kinetic energy. Caluculate the speed of the body?​

Answer 1

Kinetic energy formula:

$k.e \: = \frac{1}{2} m {v}^{2}$

Putting the given values:

$60 = \frac{1}{2} \times 0.3 \times {v}^{2}$

${v}^{2} = \frac{60 \times 2}{0.3}$

$v {}^{2} = 400 \\ v = \sqrt{400}$

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

Answer 2

Answer:

v=2m/s

Ex

given:

mass= 30kg

kinetic energy=60 j