A mass m = 1 kg initially at rest at height h = 2m slides to the bottom of a 45 ramp. there is no friction between the mass and the ramp. At the bottom of the ramp the speed of the mass is 4 m/s. How much heat was generated by the friction as the mass slides down the ramp?

Question

Any help? I'm very confused

Answer 1

final energy=orig PE -friction
1/2 m 4^2=m*g*2-friction heat

solve for friction heat.

Answer 2

Thank you so much for the help!!
Just to double check my math is correct, did you get about 2J as your answer? 2.45 to be exact

Answer 3

quick check using 10 for g

8 = 20 - heat
heat is about 12