Mechanical Engineering :: Engineering Mechanics

1.	According to principle of conservation of energy, the total momentum of a system of masses in any direction remains constant unless acted upon by an external force in that direction.
	A. True B. False Answer: Option B Explanation: No answer description available for this question.

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2.	The friction experienced by a body, when in motion, is known as
	A. rolling friction B. dynamic friction C. limiting friction D. static friction Answer: Option B Explanation: No answer description available for this question.

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3.	Two balls of equal mass and of perfectly elastic material are lying on the floor. One of the ball with velocity v is made to struck the second ball. Both the balls after impact will move with a velocity
	A. v B. v/2 C. v/4 D. v/8 Answer: Option B Explanation: No answer description available for this question.

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4.	The term 'force' may be defined as an agent which produces or tends to produce, destroys or tends to destroy motion.
	A. Agree B. Disagree Answer: Option A Explanation: No answer description available for this question.

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5.	The coefficient of restitution for elastic bodies is one.
	A. Correct B. Incorrect Answer: Option B Explanation: Coefficient of restitution for elastic bodies is 0 - 1. Coefficient of restitution for perfect elastic bodies is 1.

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