QUESTION 5 (Start on a new page.)
A roller-coaster car of mass 200 kg, with the engine switched off, travels along
track ABC which has a rough surface, as shown in the diagram below. At point A,
which is 10 m above the ground, the speed of the car is 4 m.s.
At point B, which is at a height h above the ground, the speed of the car is 2 m.st.
During the motion from point A to point B, 3,40 x 10 J of energy is used to overcome
friction.
Ignore rotational effects due to the wheels of the car.
4 m.s
2 m.s1
22 m
B
h
10 m
(2)
5.1
Define the term non-conservative force.
botravelled from
