A skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 16° with the horizontal. The rope moves parallel to the slope with a constant speed of 1.0 m/s. The force of the rope does 690 J of work on the skier as the skier moves a distance of 9.0 m up the incline. (a) If the rope moved with a constant speed of 2.5 m/s, how much work would the force of the rope do on the skier as the skier moved a distance of 9.0 m up the incline? At what rate is the force of the rope doing work on the skier when the rope moves with a speed of (b) 1.0 m/s and (c) 2.5 m/s?

A skier is pulled by a towrope up a frictionless ski slope that makes an angle of 12 with the horizontal. The rope moves parallel to the slope with a constant speed of 1.0 m/s. The force of the rope does 900 J of work on the skier as the skier moves a distance of 8.0 m up the incline. (a) If the rope moved with a constant speed of 2.0 m/s, how much work would the force of the rope do on the skier as the skier moved a distance of 8.0 m up the incline? At what rate is the force of the rope doing work on the skier when the rope moves with a speed of (b) 1.0 m/s and (c) 2.0 m/s?

A sledge loaded with bricks has a total mass of 18.6 kg and is pulled at constant speed by a rope inclined at 20.8° above the horizontal. The sledge moves a distance of 20.9 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.500. (a) What is the tension in the rope? (b) How much work is done by the rope on the sledge? kJ (c) What is the mechanical energy lost due to friction? kJ

A horizontal force of magnitude 37.4 N pushes a block of mass 3.83 kg across a floor where the coefficient of kinetic friction is 0.639. (a) How much work is done by that applied force on the block-floor system when the block slides through a displacement of 3.86 m across the floor? (b) During that displacement, the thermal energy of the block increases by 39.5 J. What is the increase in thermal energy of the floor? (c) What is the increase in the kinetic energy of the block? (a) Number Units (b) Number i Units (c) Number Units >

A skier of mass 61 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him 80 m up a 30° slope (assumed frictionless) at a constant speed of 2.9 m/s? KJ (b) What power (expressed in hp) must a motor have to perform this task? hp

A skier of mass 77 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull hìm 45 m up a 30° slope (assumed frictionless) at a constant speed of 1.9 m/s? kJ (b) What power (expressed in hp) must a motor have to perform this task? hp

A tension force of 175 N inclined at 20.0 degree above the horizontal is used to pull a 40.0-kg packing crate a distance of 6.00 m on a rough surface. If the crate moves at a constant speed, find (A) the work done by the tension force and (b) the coefficient of kinetic friction between the crate and surface.

A 246.63 kg crate slides 3.08 m until coming to a stop after being pushed by a large man. The effective coefficient of kinetic friction between the crate and the surface is 0.13. Calculate the work done by friction.

A tension force of 155 N inclined at 30.0° above the horizontal is used to pull a 35.0 kg shipping crate a distance of 5.10 m on a rough surface. If the crate moves at a constant speed, find (a) the work done by the tension force and (b) the coefficient of kinetic friction between the crate and surface. HINT (a) the work done by the tension force (in J) 688 Forces in the direction of an object's displacement do positive work on the object and tend to increase the object's speed. J (b) the coefficient of kinetic friction between the crate and surface -0 005 Need Help? Read It Watch it

A person pulls a toboggan for a distance of 37.8 m along the snow with a rope directed 21.5 ° above the snow. The tension in the rope is 88.2 N. (a) How much work is done on the toboggan by the tension force? (b) How much work is done if the same tension is directed parallel to the snow?