Question

In a lever, a load of 600 N is lifted by using 400 N effort. If the load is at the distance of 20 cm and the effort at the distance of 40 cm from the fulcrum, calculate its efficiency. *

Answer 1

Answer:

M.A100%

Explanation:

Answer:  

Load (l) = 680N  

Effort (E) = 500N  

Length of slope (l) = 12m  

Height of slope (h) = 8 m  

Now,  

Output work = load * height  

680 *8 = 5.44 *103 J  

Input work = effort * length = 500 *12 = 6000J  

Mechanical advantage (M.A) = loadeffort= 600500=1.36  

Velocity ratio (V.R) =lh=128 = 1.5  

Efficiency =M.A100%

Answer 2

Answer:

75/

Explanation:

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