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8 Energy – forces doing work

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Question 102
H

A motor lifts a load at constant speed. Its input power and efficiency remain constant. The mass of the load is doubled and the vertical distance is halved. How do the useful work done and the time taken compare with their original values?

[1]
A

The work is doubled and the time is unchanged.

B

The work is unchanged and the time is unchanged.

C

The work is doubled and the time is doubled.

D

The work is unchanged and the time is doubled.

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8 Energy – forces doing work Questions

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

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