## Read each statement below carefully, and state, with reasons, if it is true or false; During rolling, the force of friction acts in the same direction as the direction of motion of the CM of the body. The instantaneous speed of the point of contact during rolling is zero. The instantaneous acceleration of the point of contact during rolling is zero.For perfect rolling motion, work done against friction is zero. A wheel moving down a perfectly frictionless inclined plane will undergo sli ping (not rolling) motion

Read each statement below carefully, and state, with reasons, if it is true or false; During rolling, the force of friction acts in the same direction as the direction of motion of the CM of the body. The instantaneous speed of the Read More …

## A cylinder of mass 10 kg and radius 15 cm is rolling perfectly on a plane of inclination 30°. The coefficient of static friction   μs =0.25. How much is the force of friction acting on the cylinder? What is the work done against friction during rolling? If the inclination θ of the plane is increased, at what value of θ does the cylinder begin to skid, and not roll perfectly?

A cylinder of mass 10 kg and radius 15 cm is rolling perfectly on a plane of inclination 30°. The coefficient of static friction   μs =0.25. How much is the force of friction acting on the cylinder? What is the work done against Read More …

## A solid disc and a ring, both of radius 10 cm are placed on a horizontal table simultaneously, with initial angular speed equal to 10 ð rad s-1. Which of the two will start to roll earlier? The co-efficient of kinetic friction is μk =0.2

A solid disc and a ring, both of radius 10 cm are placed on a horizontal table simultaneously, with initial angular speed equal to 10 ð rad s-1. Which of the two will start to roll earlier? The co-efficient of kinetic friction Read More …

Page 1 of 9
1 2 3 4 5 6 7 8 9