A: 5000 W
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A rocket of total mass M is travelling at a speed v. The engine of the rocket is fired and fuel is used up. The mass …
A builder lifts eight slabs from the ground on to the back of a lorry 1.5 m high. The total time taken is 48 s and ea…
A child slides down a slide. The weight of the child is 250 N. The height of the slide is 7.0 m. The work done agains…
The graph shows the extension of a piece of copper wire as the load on it is increased. What does the graph show?
The diagram shows a manometer containing mercury that is sealed at one end. What happens to the distance h when the m…
Which graph shows the total external pressure acting on a submarine at different depths below the surface of the sea?