Laws of Motion ...

When a body is moving on a surface, the force of friction is called

It is easier to roll a barrel than pull it along the road.
This statement is

A marble block of mass 2 kg lying on ice when given a velocity of 6 m/s is stopped by friction in 10 s. Then the coefficient of friction is

A 60 kg weight is dragged on a horizontal surface by a rope upto 2 meters. If coefficient of friction is µ = 0.5, the angle of rope with the surface is 60^o and g = 9.8 m/sec², then work done is

A car having a mass of 1000 kg is moving at a speed of 30 meters/sec. Brakes are applied to bring the car to rest. If the frictional force between the tyres and the road surface is 5000 newtons, the car will come to rest in

If µ_s, µ_k and µ_r are coefficients of static friction, sliding friction and rolling friction, then

A body is moving along a rough horizontal surface with an initial velocity 6 m/s. If the body comes to rest after travelling 9 m, then the coefficient of sliding friction will be

A body moves along a circular path of radius 10 m and the coefficient of friction is 0.5. What should be its angular speed in rad/s if it is not to slip from the surface (g = 9.8 ms²)

The backside of a truck is open and a box of 40 kg is placed 5 m away from the rear end. The coefficient of friction of the box with the surface of the truck is 0.15. The truck starts from rest with 2 m/s² acceleration. Calculate the distance covered by the truck when the box falls off