Laws Of Motion ...

Complete the sentence.

Friction always ____________

After the body starts moving, the friction involved with motion is

Impending motion of a body is opposed by

A block of mass 1 kg lies on a horizontal surface in a truck. The coefficient of static friction between the block and the surface is 0.6. If the acceleration of the truck is 5 ms^-2, the frictional force acting on the block is

A particle moves in a circle with a constant speed of 6m /s. Its centripetal acceleration is 120 m/s², The radius of the circle is

A body rests on an inclined plane and the angle of inclination is varied till the body just begins to slide down. The coefficient of friction is . What is the angle of inclination?

A block of mass 2kg rests on a plane inclined at an angle of 30^o with the horizontal. The coefficient of friction between the block and the surface is 0.7. The frictional force acting on the block is

A particle moves in a circle of radius 0.30m with a constant speed of 6m/s. Its centripetal acceleration is

When a wheel rolls on a level road, the direction of frictional force at the point of contact of wheel and ground is

A force of 20 N is applied on a body of mass 4 kg kept on a rough surface having coefficient of friction 0.1. Find acceleration of body. Take g = 10 m/s²