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Theoretical Physics Motion Problem - Please help ASAP

A block of mass m slides across a frictionless floor and then up a frictionless ramp. The angle of the ramp is θ and the speed of the block before it starts up the ramp is v0. The block will slide up to some maximum height h above the floor before stopping. Show that h is independent of m and θ by deriving an expression for h in terms of v0 and g.

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1 Answer

Ben,

Use energy conservation to solve this.

Moving block's Kinetic Energy:  KE = 1/2*m*Vo^2

Stationary block's Potential Energy:  PE = m*g*h

Energy conserved means: KE = PE   (remember - the floor and ramp are frictionless)

1/2*m*Vo^2 = m*g*h

Isolate h and you have it.

BruceS