Question text
11 A large stone is rolled onto a lorry using a ramp. lorry l h stone ramp The length of the ramp is l. The stone is lifted a height of h. The mass of the stone is m. The weight of the stone is W. Which expression is equal to the useful work done on the stone? A m × h B W × h C m × l D W × l
11 A large stone is rolled onto a lorry using a ramp.
lorry
l
h
stone
ramp
The length of the ramp is l. The stone is lifted a height of h.
The mass of the stone is m. The weight of the stone is W.
Which expression is equal to the useful work done on the stone?
A m × h B W × h C m × l D W × l
Select your answer: