Physics Sec Sample Paper I Worksheet - University Of Malta, 2012 Page 9
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118.
Over the weekend, Luke and his friends went to Dingli Cliffs to perform
abseiling. They tied ropes to themselves and abseiled down the cliffs.
rope
Diagram 7
(a)
In order to climb down the rock face, Luke had to find equilibrium by keeping
his centre of gravity in line with the rope. Explain the term centre of gravity.
_____________________________________________________________________
(1)
(b)
Luke has a mass of 55 kg.
(i)
Calculate his weight.
_____________________________________________________________________
(ii)
Draw the weight on diagram 7. Label as ‘weight’.
(2)
(c)
Luke slowly abseils down the rock face. He holds on to the rope to guide him
down. On Diagram 7 above, draw
(i)
the forces which the rope and cliff exert on Luke. Label as F
1
and F
.
(2)
2
(ii)
the tension in the rope. Label as ‘T’
(1)
(d)
Luke and his friends wear a helmet when abseiling. Describe two properties
that a helmet must have and explain why these properties are important.
Property of helmet
Why this property is important
(4)
Page 9 of 11
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