CHAPTER 8. WORK, ENERGY AND POWER 8.4
h
a mgh c
mgh
sin θ
b mgh sin θ d^12 mv^2
- [IEB 2003/11 HG1]In which of the following situations is there no
work done on the object?
(a) An apple falls to theground.
(b) A brick is lifted fromthe ground to the top ofa building.
(c) A car slows down toa stop.
(d) A box moves at constant velocity across a frictionless horizontal
surface.
More practice video solutions or help at http://www.everythingscience.co.za
(1.) 01u7 (2.) 01u8 (3.) 01u9 (4.) 01ua (5.) 01ub (6.) 01uc
(7.) 01ud (8.) 01ue
