Question

A body has a kinetic energy of 72j and moves with a velocity of 6m/s find it mass

Answer 1

Answer:

The mass of the body is 4 kg.

Explanation:

Kinetic energy is the energy possessed by an object, by virtue of its motion. The equation to calculate the kinetic energy, K is given by,

K = (mv²) ÷ 2

Where 'm' is the mass and 'v' is the velocity of the body.

We know the values of K and v as 72 J and 6 m/s respectively. Rearranging the above equation of kinetic energy, the mass of the body can be calculated as:

m = 2K ÷ v²

m = (2 ×72) ÷ 6²

m = 144 ÷ 36

∴ mass, m = 4 kg