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8 Energy – forces doing work

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Question 35

A drive system moves a conveyor belt. The drive exerts a steady force on the belt in the direction in which the belt moves.

The table gives data from a test of the drive system.

QuantityValue
input power1.5 kW
steady force800 N
distance moved90 m
time taken75 s

The drive system is suitable only if:

  • its useful power output is at least 1.0 kW
  • its efficiency is at least 0.60.
a.

Calculate the useful power output and the efficiency of the drive system.

[3]
b.

Explain whether the drive system is suitable.

[2]
Markscheme

8 Energy – forces doing work Questions

  1. GCSE
  2. /Physics
  3. /8 Energy – forces doing work

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