A 12-pack of Omni cola, total mass of 4.30 kg, is initially at rest on a horizontal surface. It is the pushed 1.50 m by a horizontal force of magnitude 35.0 N. (a) Use the work-energy theorem to find the final speed of the 12- pack is the surface is frictionless. (b) Use the work-energy theorem to find the final speed if the coefficient of kinetic friction is 0.25,

A 68.3-kg skier coasts up a snow-covered hill that makes an angle of 25.5 ° with the horizontal. The initial speed of the skier is 9.77 m/s. After coasting a distance of 1.45 m up the slope, the speed of the skier is 3.60 m/s. (a) Find the work done by the kinetic frictional force that acts on the skis. (b) What is the magnitude of the kinetic frictional force? (a) Number i (b) Number i Units Units 0

Problem 2: Suppose the ski patrol lowers a rescue sled carrying an injured skiier, with a combined mass of 97.5 kg, down a 60.0° slope at constant speed, as shown in the Figure. The coefficient of kinetic friction between the sled and the snow is 0.100. 60° ©theexpertta.com Part (a) How much work, in joules, is done by friction as the sled moves 30.5 m along the hill? W; = - 1458.6 W; = -1459 vCorrect! Part (b) How much work, in joules, is done by the rope on the sled over this distance? W, = 2.38 * 104 W, = 23800 X Feedback: is available. Part (c) What is the work, in joules, done by the gravitational force on the sled? W, = 2.53 * 104 W. = 25300 / Correct! Part (d) What is the net work done on the sled, in joules? Wnet = sin() cos() tan() 7 8 9 HOME cotan() asin() acos() E 4 5 6 atan() acotan() sinh() 1 2 3 cosh() ODegrees O Radians tanh() cotanh() END VOl BACKSPACE DEL CLEAR Submit Hint Feedback I give up!

A sled is given a push across a horizontal surface. The sled has a mass m, the push gives it an initial speed of 3.40 m/s, and the coefficient of kinetic friction between the sled and the surface is 0.150. (a) Use energy considerations to find the distance (in m) the sled moves before it stops. m (b) What If? Determine the stopping distance (in m) for the sled if its initial speed is doubled to 6.80 m/s. m

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 62.7-kg skier coasts up a snow-covered hill that makes an angle of 20.4 ° with the horizontal. The initial speed of the skier is 8.61 m/s. After coasting a distance of 2.21 m up the slope, the speed of the skier is 4.14 m/s. (a) Find the work done by the kinetic frictional force that acts on the skis. (b) What is the magnitude of the kinetic frictional force?

Suppose the ski patrol lowers a rescue sled carrying an injured skiier, with a combined mass of 77.5 kg, down a 60.0° slope at constant speed, as shown in the Figure. The coefficient of kinetic friction between the sled and the snow is 0.100. b)How much work, in joules, is done by the rope on the sled over this distance?