Question

What's the velocity of a ball falling with 100 joules of kinetic energy and a mass of 2 kilograms?

Answer 1

Answer:

E

Explanation:

kinetic energy of linear motion

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

kinetic energy, K.e= 100joules

mass, m = 2kg

velocity, v =?

substituting the values into the formula :

$100joules = \frac{1}{2} \times 2kg \times {v}^{2}$

${v }^{2} = 100$

$v = \sqrt{100 }$

$v = 10m { \sec }^{ - 1}$