Question

The kinetic energy of an object can be determined using the equation , where is the kinetic energy, is the mass, and is the speed of the object. What is the mass of an object moving at a speed of 12 that has 36 J of kinetic energy?

Answer 1

0.5kg

Step-by-step explanation:

Given parameters:

Speed of the object = 12m/s

Kinetic energy = 36J

Unknown:

Mass of the object = ?

Solution:

Kinetic energy is the energy due to the motion of a body. It is mathematically expressed as;

K.E =
`(1)/(2)` m v²

Insert the parameters and solve;

36 =
`(1)/(2)` x m x 12²

36 = 72m

m = 0.5kg