Question

A 20 kg object falls from a height of 30 meters. How many joules of kinetic energy will the object have just before it hits the ground?

Answer 1

the gain in KE = loss of PE

PE = mgh

where m= mass, g = acceleration of gravity on earth, and h = change in height

You have all three factors : just put them in the equation and calculate the answer.

Answer 2

my calculations are never right and it throws me off

Answer 3

I am not going to do a simple multiplication for you

Answer 4

k.E=mgh=20*9.8*30

Answer 5

@bhNood

Answer 6

thanks

Answer 7

welcome