A) Oil magnifies the applied muscular force
B) Oil reduces the friction between two surfaces
C) Application of oil generates an upward thrust
D) Application of oil reduces the gravitational force
Correct Answer: B
Solution :
Oil is one of the best lubricants. The application of lubricants between two moving surfaces reduces the friction between them. Since friction always opposes motion, the resistance against the motion of the given box is reduced on the oil spread floor. Hence, Pappu can push the box by applying a relatively lesser muscular force. The correct answer is B.You need to login to perform this action.
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