A block of mass m is resting on an inclined plane. The inclination of the plane to the horizontal is gradually increased. It is found that when angle of inclination is theta , the block just begins to slide down the plane. What is the minimum force F applied parallel to the plane that would just make the block move up the plane?

A block of mass m is resting on an inclined plane. The inclination of

1.	A block of mass m is resting on an inclined plane. The inclination of the plane to the horizontal is gradually increased. It is found that when angle of inclination is theta , the block just begins to slide down the plane. What is the minimum force F applied parallel to the plane that would just make the block move up the plane?
Answer» `2mgsin THETA` `mg sintheta` `mg COS theta` `2 mgcos theta` Solution :`2mgsin theta`