A 5.5 kg block that is initially at rest on a frictionless horizontal surface was pulled with a constant force of 3.8 N. At what distance must it be pulled before its speed is 5.2 m/s?

A 60.0 kg skier with an initial speed of 16.5 m/s coasts up a 2.50 m high rise as shown in the figure. Find her final speed right at the top, in meters per second, given that the coefficient of friction between her skis and the snow is 0.35.

A glider of mass 0.275kg is placed at rest on an air track that has an angle of inclination of 10°.  The height of the glider above the table is 30cm.  The glider is released traveling 1.15m down along the track.  When the glider is at 10cm above the height of the table, the velocity is 1.5m/s.  What is the frictional force acting on the glider?

7. An 8.00 kg block is released from rest and slides 1.60 m down a 40° slope. Its speed at that point is 4.00 m/s. Find the magnitude of the frictional force on the block. 'i= 0 m/s V2= 4 m/s 1.6 m 40°

Two objects with the same mass are sliding on a frictionless surface that becomes an incline.  Object 1 has a speed of V and object 2 has a speed 2V.  Which object will slide the farthest up the incline?

A girl on a skateboard (total mass of 40 kg) is moving at a speed of 10 m/s at the bottom of a long ramp. The ramp is inclined at 20° with respect to the horizontal. If she travels 14.2 m upward along the ramp before stopping, what is the net frictional force on her?

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

Using a simple pulley and rope system, a crewman on an Arctic expedition is trying to lower a crate of mass ?1=5.13 kg to the bottom of a steep ravine of height ?=22.5 m. The crewman of mass ?2=60.9 kg is walking while holding the rope, being careful to lower the crate at a constant speed of ?0=1.50 m/s. Unfortunately, when the crate reaches a point ℎ=12.5 m above the ground, the crewman steps on a slick patch of ice and slips. The crate immediately accelerates toward the ground, dragging the hapless crewman across the ice and toward the edge of the cliff. Assuming the ice is perfectly slick, so that there is no friction between the crewman and the ice once he slips and falls down, at what speed ?1 will the crate hit the ground? Assume also that the rope is long enough to allow the crate to hit the ground before the crewman slides over the side of the cliff, and that the pulley is frictionless. ?1=.     m/s   At what speed ?2 will the crewman hit the bottom of the ravine? Assume no…

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 car traveling at 22 m/s runs out of gas while traveling up a 200 slope. How far up the hill will it coast before starting to roll back down? Assume that car rolls without friction.