Question

A pulley is used to lift a heavy mass from the floor to a platform. The IMA of the system is 5 and the AMA is 2.5. What is the efficiency of the system?

Answer 1

efficiency = 2.5 / 5 = 0.50 = 50%

Answer 2

The efficiency of the system is 50 %.

Step-by-step explanation:

Given that,

IMA of the system = 5

AMA of the system = 2.5

The formula of efficiency of the system is defined as:

`\eta = (AMA)/(IMA)*100`

Where, IMA = Ideal mechanical advantage

Ideal mechanical advantage is equal to the effort distance divided by the resistance distance.

AMA = Actual mechanical advantage

Actual mechanical advantage is equal to the resistance force divided by the effort force.

`\eta = (2.5)/(5)*100`

`\eta = 50\%`

Hence, The efficiency of the system is 50 %.