Skip to content

Course home

Sign up

8 Energy – forces doing work

EasyMediumHard
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152
Question 8

During one opening, an automatic door mechanism receives 2500 J of electrical energy. Of this energy, 500 J is dissipated in unwanted transfers. What is the efficiency of the door mechanism?

[1]
A

0.830.830.83

B

0.800.800.80

C

0.200.200.20

D

0.250.250.25

Markscheme

8 Energy – forces doing work Questions

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

Question bank