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Date May 2017 Marks available 1 Reference code 17M.1.SL.TZ2.7
Level Standard level Paper Paper 1 Time zone Time zone 2
Command term Question number 7 Adapted from N/A

Question

The efficiency of an electric motor is 20 %. When lifting a body 500 J of energy are wasted. What is the useful work done by the motor?

A.  100 J

B.  125 J

C.  250 J

D.  400 J

Markscheme

B

Examiners report

[N/A]

Syllabus sections

Core » Topic 2: Mechanics » 2.3 – Work, energy, and power
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