Question

C.(i) Draw a diagram to show a block and tackle pulley system having a velocity ratio of 3, marking the
direction of load, effort and tension.
(ii) The pulley system drawn lifts a load of 150 N when an effort of 60 N is applied. Find its mechanical
advantage.
(4)
(III) is the above pulley system an ideal machine or not?
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Answer 1

Answer:

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Answer 2

Answer:

2. Load to be lifted F

L

=150 N

Effort required F

E

=60 N

Mechanical advantage MA=

F

E

F

L

=

60

150

=2.5

The term ideal machine is referred to those mechanical system in which no energy and power is lost due to friction, deformation etc. ... Hence pulley system is not an ideal machine.

Explanation:

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