Q1. (a) A 15 m long light beam is supported at A and B at two ends. Loads of 60 N and 40 N are applied vertically at distances of 12 m and 6 m from point B respectively as. shown below. Calculate the reactions at A and B. A RA 3 m 60 N 6 m 40 N 6 m B RB
Q1. (a) A 15 m long light beam is supported at A and B at two ends. Loads of 60 N and 40 N are applied vertically at distances of 12 m and 6 m from point B respectively as. shown below. Calculate the reactions at A and B. A RA 3 m 60 N 6 m 40 N 6 m B RB
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Transcribed Image Text:Q1. (a) A 15 m long light beam is supported at A and B at two ends. Loads of 60 N and 40
N are applied vertically at distances of 12 m and 6 m from point B respectively as.
shown below. Calculate the reactions at A and B.
A
RA
3 m
60 N
6 m
40 N
35⁰
6 m
B
(b) A ball of mass 4 kg is hung by an inelastic string from the ceiling. A horizontal
force applied to the ball such that the string deflected with an angle 35° from the
vertical. Find the magnitude of the force and the tension in the string.
(i) Find the acceleration of the block.
(ii) Find the displacement after 8 seconds.
RB
4 kg
(c) A wooden block of mass 2 kg lying on a horizontal floor is pulled by a horizontal
force of 30 N. The coefficient of friction between the block and the floor is 0.3.
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