A crate of mass 20 kg is sliding across a wooden floor. The coefficient of kinetic friction between the crate and the floor is 0.3.
If the crate is being pulled by a force of 90 N (parallel to the floor), find the acceleration of the crate.

If the coefficient of kinetic friction be in above question then the initial acceleration of the crate will be :

A person pushes horizontally with a force of 220 N on a 55 kg crate to move it across a level floor. The coefficient of kinetic friction between the crate and the floor is 0.35. What is the magnitude of (a) the frictional force?

A man of mass 75 kg is pushing a heavy box on a flat floor. The coefficient of kinetic and static friction between the floor and the box is 0.20 , and the coefficient of static friction between the man's shoes and the floor is 0.80 . If the man pushes horizontally, what is the maximum values (in kg ) of the box he can move?

A man of mass 75 kg is pushing a heavy box on a flat floor. The coefficient of kinetic and static friction between the floor and the box is 0.20 , and the coefficient of static friction between the man's shoes and the floor is 0.80 . If the man pushes horizontally, what is the maximum values (in kg ) of the box he can move?

A block of mass m is placed on a rough floor of a lift . The coefficient of friction between the block and the floor is mu . When the lift falls freely, the block is pulled horizontally on the floor. What is the force of friction -