Depending on whether the object in question gains or loses energy.
Review questions
1. Explain the meaning of the term work done and give an
example of where work is done.
2. Calculate the total work done in the following examples:
a) A 20 kg log lifted 2 m into the air
b) Thirty 6 kg boxes lifted onto a shelf 1.5 m high
c) A car of mass 1400 kg pushed 50 m along a road
(u kinetis = 0.3)
d) A concrete slab of mass 200 kg pulled 10 m up a slope at a
angle of 30° to the horizontal (u, = 0.6).
kinetic
3 Do
*1​