Question

Suppose that you drop a 10 Kg object from a table and gains a kineticenergy of 100 J right before it hits that ground. How high was the table?Use g = 10 m/s2

Answer 1

KE when it hits the ground = PE before it's dropped

PE = mgh

KE = mv^2/2 = 100J

100 J = mgh

100 = 10*10*h

h = 100/100

h = 1 m