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:
The efficiency of the system is 50 %.
Explanation:
Given that,
IMA of the system = 5
AMA of the system = 2.5
The formula of efficiency of the system is defined as:
\(\eta = \dfrac{AMA}{IMA}\times100\)
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.
\(\eta = \dfrac{2.5}{5}\times100\)
\(\eta = 50\%\)
Hence, The efficiency of the system is 50 %.