(11)
if the motorbike is driven at the sum upuu
marks)
2.
the diagram shows two children playing with a toy called a swing ball. the ball is joined to
a pole by a strong string. the children hit the ball so that it goes round in a circular path.
air
resistance
tension
weight
circular path
of swing ball
(a)
name the force labelled in the diagram that causes the ball to move in a circle? (1)
(b) choose the correct response:
(1)
the force needed to make the ball move in a circular path is larger if
a) the speed of the ball is increased.
b) the speed of the ball is decreased.
c) the string is made longer.