Part 2: Short answer questions (Total 20 mark] 21. Below shows a man doing two stages of a pull up. In both diagrams the man is stationary.
a) Complete the sentence.
Choose the answers
from the box
(1 mark]
equal to
less than
more than
Sage 1
Etor 2
In stage 1 the downwards force of the man on the bar is
the upwards force of the
bar on the man
(b) The man has a mass of 85 kg. Gravitational field strength = 9.8 N/kg. Calculate the weight of the man.
Use the equation: weight = mass x gravitational field strength
[3 marks)
85 *9.8=
Weight - 833
Lunit: t
[3 marks)
(c) The man raises his body a vertical distance of 0.63 m to go from stage 1 to stage 2
Calculate the work done by the man. Use your answer to part (b)
Use the equation: work done = force x distance
Work done =
Unit =
(d) The man was not moving at stage 2. How much work is done by the man at stage 2?
[1 mark]
Work done =