
The acceleration of a body moving up a rough inclined plane when it is pulled up by a force, depends only on its mass.
Reason
Frictional force acts in the direction of the applied force.

Important Questions on Laws of Motion








Consider a block kept on an inclined plane (inclined at ) as shown in the figure. If the force required to just push it up the incline is times the force required to just prevent it from sliding down, the coefficient of friction between the block and inclined plane is equal to :
.





A brick of mass slides down an incline of height and angle If the coefficient of friction of the incline is the velocity of the block at the bottom of the incline is (Assume the acceleration due to gravity is

A block of mass is kept against an accelerating wedge with a wedge angle of to the horizontal. The co-efficient of friction between the block and the wedge is . What is the minimum absolute value of the acceleration of the wedge to keep the block steady. Assume



If a block takes thrice as much time to slide down a rough inclined plane as it takes to slide down a similar smooth plane. Then coefficient of friction is




Represent the union of two sets by Venn diagram for each of the following.
is a prime number between and
is an odd number between and



