Question

An object has a velocity of 8m/s and a kinetic energy at 480j. What is the mass of the object? A:7.5kg. B:15kg. C:60kg. D:120kg.

Answer 1

Answer:

m = 15Kg

Explanation:

We know that Kinetic Energy of an object is given by,

K = 1/2 mv²

Given, k = 480J ; v = 8m/s

Substituting these values, we get

480 = 1/2 x m x (8)²

480 = 1/2 x m x 64

480 = m x 32

m = 480 / 32

m = 15Kg