A ski slides down a 25° slope for 25 m before taking off from a negligibly short horizontal ramp. If the jumper’s take-off speed is15 m/s, what is the coefficient of kinetic friction between skis and slope?
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A ski slides down a 25° slope for 25 m before taking off from a negligibly short horizontal ramp. If the jumper’s take-off speed is15 m/s, what is the coefficient of kinetic friction between skis
and slope?
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- An object is given an initial speed of 5 m/s on a horizontal surface.It slides 10 m on the horizontal surface before it stops due to friction.What is the coefficient of kinetic friction between the object and the surface?A ski slides down a 25 degree slope for 25 meters before taking off a negligibly short horizontal ramp. If the jumper's take-off speed is 15 m/s, what is the kinetic coefficient of kinetic friction between the skis and slope?A 15 kg box is initially sliding across a frictionless floor with a constant speed of 2.5 m/s.Then, the box encounters a rough surface and travels for 12 meters before coming to astop. What is the coefficient of kinetic friction between the box and rough surface?
- A skier slides down a hill in a straight line. The hill is 60m high and the coefficient of kinetic friction between the snow and the skis is 0.1. The hill is at an angle of 10 degrees with the horizontal. The mass of the skier is 70 kg. If the skier starts her run from rest and air friction can be ignored, how fast is she moving at the bottom of the hill? Please answer in units of m/s.You are driving through the Ouachita Mountains at 12m/s. You see a maple-leaf oak (Quercus acerifolia) crossing the road and hit the brakes, 20m away. The coefficient of kinetic friction between your tires and the road is μ_k = 0.7. Will you strike this endangered broadleaf? Justify your answer with a calculation.Your final answer should be the distance you will travel before coming to a stop.A 200-g hockey puck is launched up a ramp that is inclined at a 30° angle above the horizontal. The coefficients of static and kinetic friction between the puck and the ramp are µs = 0.40 and µk = 0.30, respectively, and the puck's initial velocity at the base is 3.8 m/s parallel to the sloping surface of the ramp. What speed does the puck have when it slides back down to its starting point?
- A 200 g hockey puck is launched up a metal ramp that is inclined at a 30° angle. The coefficients of static and kinetic friction between the hockey puck and the metal ramp are μs = 0.40 and μk = 0.30, respectively. The puck's initial speed is 14.9 m/s. What speed does it have when it slides back down to its starting point?A 0.30 kg puck is being pushed across a table with a horizontal force of 2.0 N. It starts from rest and is pushed for 13 seconds, ending with a speed of 1 m/s. Calculate the coefficient of friction μk between the puck and the table.Multiple-Concept Example 5 reviews many of the concepts that play a role in this problem. An extreme skier, starting from rest, coasts down a mountain that makes an angle of 22.7° with the horizontal. The coefficient of kinetic friction between her skis and the snow is 0.156. She coasts for a distance of 17.1 m before coming to the edge of a cliff. Without slowing down, she skis off the cliff and lands downhill at a point whose vertical distance is 4.65 m below the edge. How fast is she going just before she lands? Number i Units
- You're standing at the top of a snow-covered hill, sloped at 20.0°. The coefficient of kinetic friction between your sled and the hill is 0.534. Unfortunately, there's a running stream just at the bottom of the hill, and you don't want to get wet. If you and your sled together have a mass of 87.0 kg, with what speed should you push off with to stop just before the stream, 77.0 m down the slope?A warehouse worker exerts a constant horizontal force of magnitude 85 N on a 40 kg box that is initially at rest on the horizontal floor of the warehouse.When the box has moved a distance of 1.4 m, its speed is 1.0 m/s.What is the coefficient of kinetic friction between the box and the floor?looking at a ski slope, the length of the slope is 10.00x10^2m and the top of the slope is at an angle of 8.00 degrees relative to the horizontal. Once the slope has ended the skier continues along a level horizontal before stopping. The coefficient of kinetic friction between the skis and the snow is 0.090 on both the slope and the straight horizontal section. What is the distance that the man travels on this horizontal section, assuming that the man started from the rest at the top of the slope.