Edexcel A-Level Physics AS 1.3.22 Efficiency Equations Questions

Practise Edexcel IAL Physics 1.1.22 by calculating efficiency from energy or power and comparing useful, wasted and dissipated transfers.

Exam points

calculate efficiency from useful energy or power output divided by total input
use VI, mgh/t, intensity times area or P=E/t to build input and output powers
assess energy-transfer claims by comparing useful, wasted and dissipated energy values

[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 1.3.22 Efficiency Equations 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 $=6.25 \mathrm{~kW}$

Determine the efficiency of the system.

Efficiency =

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Edexcel A-Level Physics AS 1.3.22 Efficiency Equations Questions question 1