Edexcel A-Level Physics AS 1.3.19 Gravitational Potential Energy Questions

Practise Edexcel IAL Physics 1.1.19 by calculating gravitational potential-energy changes and relating them to useful work against weight.

Exam points

calculate changes in gravitational potential energy or useful work using E=mgh
identify gravitational potential energy increase as work done against weight

[Maximum number: 2]

The diagram shows a system used to move a stone block up a ramp. A team of people uses a rope to pull the block at a constant speed.

Figure for Question Edexcel A-Level Physics AS 1.3.19 Gravitational Potential Energy Questions question 1 — Edexcel A-Level Physics AS

height of ramp $=4.35 \mathrm{~m}$
angle of ramp to horizontal $=6.0^{\circ}$
mass of block $=2.10 \times 10^{3} \mathrm{~kg}$
speed of block up ramp $=0.450 \mathrm{~m} \mathrm{~s}^{-1}$
total power of team $=6.25 \mathrm{~kW}$

Show that the useful work done on the block is about 90 kJ.

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Edexcel A-Level Physics AS 1.3.19 Gravitational Potential Energy Questions question 1