Question

the kinetic energy of a moving object can be calculated from the expression 1/2mv[2], where m is the mass of the object in kilograms and v is its speed in meters per second. find the kinetic energy of a 145-kg baseball that is thrown at a speed of 40 meters per second

Answer 1

So, we plug the values back into the formula. 1/2(145)(40)^2

First we square velocity, so it will be: 1600.

Then 1600*145 = 232000

Divide this by 2, so: 116,00

So, the kinetic energy would be 116,000.