Frictionless ramp, constant velocity, find work

[holls14]

Homework Statement

Movers must push a piano onto a truck, the bed of which is a height 1.73 m above the ground. To do this they will use a frictionless ramp. If the piano has a mass of 1635.0 kg and the movers push it up the slope at a constant velocity, how much work do they need to do on it to move it into the bed? Please provide your answer in kilo-Joules (kJ), as the amount of work should be quite large.

Homework Equations

The Attempt at a Solution

I have no clue where to start here, no angle?

 

[jey1234]

Homework Statement

Movers must push a piano onto a truck, the bed of which is a height 1.73 m above the ground. To do this they will use a frictionless ramp. If the piano has a mass of 1635.0 kg and the movers push it up the slope at a constant velocity, how much work do they need to do on it to move it into the bed? Please provide your answer in kilo-Joules (kJ), as the amount of work should be quite large.

Homework Equations

The Attempt at a Solution

I have no clue where to start here, no angle?

Do not think of it as a dynamics problem with forces (i.e. you don't need an angle). This is a conservation of energy problem. The work you put into the moving the piano up 1.73 m turns into potential energy. If we think of it in reverse, the potential energy of the piano afterwards is equal to the _______ .

K + U (before) = K + U (after)

where K is kinetic energy and U is potential energy.

K = (1/2)mv²
U = mgh