A trolley moves across a level surface, then goes up an incline before arriving on a second level surface. The incline has length $L$. The trolley’s mass is $M$. The incline makes an angle $\alpha$ with the horizontal surface. The second horizontal surface is at height $h$ above the first surface. Ignore frictional forces. The acceleration of free fall is known. To find the minimum initial velocity needed for the trolley to just reach the top of the slope, what further quantities are required?
- A$h$ and $M$
- B$M$, $L$ and $h$
- C$\alpha$, $L$, $M$
- D$h$ only