Physics
In figure draw a tackle to lift the load by applying the force in the downward direction.
(a) Mark in the diagram the direction of load L and effort E.
(b) If the load is raised by 1 m, through what distance will the effort move?
(c) State the number of strands of tackle supporting the load.
(d) What is the mechanical advantage of the system?
Machines
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Answer
(a) The below diagram shows the tackle along with the direction of load L and effort E marked:
(b) As we know that in a system of 5 pulleys, if the load moves up through a distance 1 m, each segment of the string is loosened by a length 1m so the effort end moves through a distance 5 times 1m i.e. 5m
(c) Five strands of tackle are supporting the load.
(d) As we know,
Load = 5m
Effort = 1m
Substituting the values in the formula for M.A. we get,
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