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Solution for A Boy Has to Lift a Load of Mass 50 Kg to a Height of 1 M. (A) What Effort is Required If He Lifts It Directly? Take G = 10 N Kg-1 (B) If the Boy Can Exert a Maximum Effort of 250 N, So He Uses an I - ICSE Class 10 - Physics

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Question

A boy has to lift a load of mass 50 kg to a height of 1 m. (a) what effort is required if he lifts it directly? Take g = 10 N kg-1 (b) If the boy can exert a maximum effort of 250 N, so he uses an inclined plane to lift the load up. What should be the minimum length of the plank used by him?

Solution

Mass of load m = 50 kg
Force required to lift a load 1 meter (h) = mxg = 50x10 = 500N
The maximum effort exerted by boy E =250 N
Load L = 500N
Mechanical advantage M.A = `"𝑙𝑜𝑎𝑑"/"𝑒𝑓𝑓𝑜𝑟𝑡"` =  `500/250` = 2
M.A = `"𝐼"/"ℎ"`
Height (h) =1m
Minimum length of plank l = MA x h = 2x1 = 2m

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Solution A Boy Has to Lift a Load of Mass 50 Kg to a Height of 1 M. (A) What Effort is Required If He Lifts It Directly? Take G = 10 N Kg-1 (B) If the Boy Can Exert a Maximum Effort of 250 N, So He Uses an I Concept: Concept of Machines Numercials.
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