A barrel of mass $40\,\text{kg}$ is lifted to a height of $1.5\,\text{m}$ by being rolled up a ramp. The ramp has a length of $8.0\,\text{m}$. The force $F$ acting on the barrel is parallel to the ramp. Frictional effects are negligible. Which row is correct?
- Again in gravitational potential energy $= 60\,\text{J}$, force $F = 7.5\,\text{N}$
- Bgain in gravitational potential energy $= 60\,\text{J}$, force $F = 40\,\text{N}$
- Cgain in gravitational potential energy $= 600\,\text{J}$, force $F = 75\,\text{N}$
- Dgain in gravitational potential energy $= 600\,\text{J}$, force $F = 400\,\text{N}$