Q: Coefficient of friction is the ratio of the limiting friction to the normal reaction between the two bodies.

- yes
- No

Ans: 1. yes

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# Month: December 2017

## Coefficient of friction is the ratio of the limiting friction to the normal reaction between the two bodies.

## A smooth cylinder lying on its convex surface remains in __________ equilibrium.

## If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is

## A body of weight W is required to move up on rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by(where μ = tanφ = Coefficient of friction between the plane and the body.)

## The angle of inclination of a vehicle when moving along a circular path __________ upon its mass.

## The range of projectile on a downward inclined plane is __________ the range on upward inclined plane for the same velocity of projection and angle of projection.

## The velocity ratio in case of an inclined plane inclined at angle θ to the horizontal and weight being pulled up the inclined plane by vertical effort is

## The coefficient of restitution for elastic bodies is one.

## The term ‘force’ may be defined as an agent which produces or tends to produce, destroys or tends to destroy motion.

## 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

Idea Around You

Q: A body of weight *W* is required to move up on rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by(where μ = tanφ = Coefficient of friction between the plane and the body.)

*P*=*W*tanα*P*=*W*tan(α + φ)*P*=*W*(sinα + μcosα)*P*=*W*(cosα + μsinα)

Ans: 3. *P*= *W* (sinα + μcosα)