Question

Four pulley system is shown in the diagram. If its efficiency is 80%, calculate by using the formula: i. the effort applied to lift the load ii. output work when the load is lifted up to 6 metres iii. input work iv. mechanical advantage​

Answer 1

Answer:

Correct option is

A

125N

Velocity Ratio=3

Efficiency=80/100

Mechanical Advantage=efficiency×Velocity ratio

⇒10080×3

⇒2.4

M.A=effortload

2.4=Effort300N

⇒Effort=2.4300N=125N

Explanation:

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Answer 2

Answer:

Explanation:

my method