JAMB - Physics (2010 - No. 5)
A machine of velocity ratio 6 requires an effort of 400 N to raise a load of 800 N through I m. Find the efficiency of the machine
55. 6 %
50.0%
33.3%
22.2%
คำอธิบาย
Efficiency = (MA)/V.R x 100% = (load)/Effort x (1)/V.R
= (800)/400 x (1)/6 x 100% = 33.3%
= (800)/400 x (1)/6 x 100% = 33.3%