Question

A 3 kg block is released from rest at the top of a 20 m long frictionless ramp that is 5 m high.
Find the values for the block just before it reaches ground level.

(a) gravitational potential energy
----J

(b) kinetic energy
----J

(c) speed
-----m/s


(d) momentum
------kg·m/s

Answer 1

(a) m g h = 3 g (5) =15g at top
BUT I assume you are choosing it to be ZERO at the bottom

(b) (1/2)m v^2 = mgh = 15 g of course

(c) v = sqrt (2 g h)

v = sqrt(10 g)

(c)