A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.860 m/s encounters a rough horizontal surface of length ℓ = 0.65 m as in the figure below. If the coefficient of kinetic friction between the crate and rough surface is 0.350 and he exerts a constant horizontal force of 291 N on the crate (a) Find the magnitude and direction of the net force on the crate while it is on the rough surface. magnitude_____N direction (b) Find the net work done on the crate while it is on the rough surface.   _____J (c) Find the speed of the crate when it reaches the end of the rough surface.  ______m/s

A skier starts from rest at the top of a hill that is inclined at 11.0° with respect to the horizontal. The hillside is 220 m long, and the coefficient of friction between snow and skis is 0.0750. At the bottom of the hill, the snow is level and the coefficient of friction is unchanged. How far does the skier glide along the horizontal portion of the snow before coming to rest?

A rope exerts a constant horizontal force of 280 N to pull a 50kg crate across the floor. the velocity of the crate is observed to increase from 1m/s to 7m/s in a time of 2 seconds under the influence of this force and the frictional force exerted by the floor on the crate. What is the magnitude of the frictional force acting on the crate?

An applied force of 44 N directed at an angle of -18.3 degrees with respect to the +x direction acts on a 2.89 kg mass that is initially at rest while on a horizontal surface. In moving a distance of 2.96 m in the +x direction, the object changes its kinetic energy by 30.2 J. What is the coefficient of kinetic friction?

A rope attached to an engine pulls a 839 N crate up an 18.0° ramp at constant speed. The coefficient of kinetic friction for the surfaces of the crate and ramp is 0.19. What is the magnitude of the force that the rope exerts on the crate parallel to the ramp?

A 20-kg sled is being pulled along the horizontal snow-covered ground by a horizontal force of 28 N. Starting from rest, the sled attains a speed of 2.6 m/s in 9.4 m. Find the coefficient of kinetic friction between the runners of the sled and the snow.

A block of mass m = 54 kg slides along a horizontal surface. The coefficient of friction between the block and the surface is μk = 0.37. The block has an initial speed of vo = 15 m/s in the positive x-direction as shown.  Write an expression for the x-component of the frictional force the block experiences, Ff, in terms of the given variables and variables available in the palette.   What is the magnitude of the frictional force in N?  How far will the block travel, in meters, before coming to rest?

The 60-kg crate is projected along the floor with an initial speed of vo = 6.8 m/s at x = 0. The coefficient of kinetic friction is μk = 0.55. Calculate the time t required for the crate to come to rest and the corresponding distance x traveled. Answers: t = Hk X = i VO S m

A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.880 m/s encounters a rough horizontal surface of length = 0.65 m as in the figure below. If the coefficient of kinetic friction between the crate and rough surface is 0.357 and he exerts a constant horizontal force of 293 N on the crate. (a) Find the magnitude and direction of the net force on the crate while it is on the rough surface. magnitude N direction --Select--- (b) Find the net work done on the crate while it is on the rough surface. (c) Find the speed of the crate when it reaches the end of the rough surface. m/s

A warehouse worker is pushing a 90.0 kg crate with a horizontal force of 276N at a speed of v = 0.875m/s across the warehouse floor. He encounters a rough horizontal section of the floor that is 0.75 m long and where the coefficient of kinetic friction between the crate and floor is 0.353. (a) Determine the magnitude and direction of the net force acting on the crate while it is pushed over the rough section of the floor. magnitude Ndirection ---Select--- up down in the same direction as the motion of the crate in the opposite direction as the motion of the crate (b) Determine the net work done on the crate while it is pushed over the rough section of the floor. J (c) Find the speed of the crate when it reaches the end of the rough surface. m/s