SLIDING FRICTION

A block of mass 5 kg slides down a rough inclined surface. The angle of inclination is 45^(@) . The coefficient of sliding friction is 0.20. When the block slides 10 cm, the work done on the block by force of friction is

Assertion: It is difficult to move a heavy box by sliding whereas it becomes easier to move the same box when rollers are placed under it. Reason: F_("rolling")ltF_("sliding")ltF_("limitting static") (Rolling friction lt Sliding friction lt limmiting static friction.

A block of mass 2 kg is given a push for a moment horizontally and then the block starts sliding over a horizontal plane. The graph shows the velocity - time of the motion. The co - efficient of sliding friction between the plane and the block is :

A block sliding down on a rough 45^(@) inclined planes has half the velocity it would have been, the inclined plane is smooth. The coefficient of sliding friction between the the block and the inclined plane is

A block of mass 10 kg slides down a rough slope which is inclined at 45^(0) to the horizontal. The coeffficient of sliding friction is 0.30 . When the block has to slide 5m , the work done on the block by the force of friction is nearly

A 60kg is pushed horizontaly with just enough force to start it moving across a floor and the same force continues to act afterwards. The coefficient of static friction and sliding friction are 0.5and 0.4 respectively the accleration of the body is

A 60 kg body is pushed with just enough force to start it moving across a floor and the same force continues to act afterwards. The coefficient of static friction and sliding friction are 0.5 and 0.4 respectively. The acceleration of the body is

A 2 kg object is slide along a rough floor (coefficient of sliding friction = 0.3) with initial volocity (10 m//s) hat i . Describe the motion of the object relation to car assuming that the coefficient of static friction is greater than 0.5 .

A 20kg box is gently placed on a rough inclined plane of inclination 30^(@) with horizontal. The coefficient of sliding friction between the box and the plane is 0.5.Find the acceleration of the box down the incline.