What is the decrease in elevation of a 4-kg body whose kinetic energy increases from 20 J to 100 J as a result of moving downward along an inclined plane?

Question

set Potential energy change equal to KE change

mgh= change in KE

thanks a lot!

Answer 1

change in W = 100J-20J
mgh = 80J
40(9.8)(d) = 80J
39.2(d) = 80J
d = 2.040816327m.