WAEC - Physics (1995 - No. 9)
A machine has an efficiency of 60%. If the machine is required to overcome a load of 30 N with a force of 20 N calculate its mechanical advantage?
0.7
0.9
1.5
2.5
10.0
설명
Mechanical Advantage = \(\frac{Load}{Effort}\) but Load = 30N and Effort = 20N
M . A = \(\frac{30}{20}\) = 1.5