A doctor pushed a 16-kg sled along the horizontal snow-covered ground by a horizontal force of 24 N. Starting from rest, the sled attains a speed of 2.0 m/s in 8.0 m. Find the coefficient of kinetic friction between the runners of the sled and the snow

A 47 kg skater is standing still in front of a wall. By pushing against the wall she propels herself backwards with a velocity of -1.1 m/s. Her hands are in contact with the wall for 1 seconds. Ignoring friction and wind resistance, find the average force she exerts on the wall? Faverage

Current Attempt in Progress The figure shows a cold package of hot dogs sliding rightward across a frictionless floor through a distance d = 22.0 cm while three forces act on the package. Two of them are horizontal and have the magnitudes F₁ = 8.0 N and F₂ = 2.0 N; the third is angled down by = 60.0° and has the magnitude F3 = 7.0 N. (a) For the 22.0 cm displacement, what is the net work done on the package by the three applied forces, the gravitational force on the package, and the normal force on the package? (b) If the package has a mass of 4.0 kg and an initial kinetic energy of 0, what is its speed (in m/s) at the end of the displacement? (a) Number i (b) Number Units Units Hot Dogs Ve F F d

A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.870 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 0.350 and he exerts a constant horizontal force of 279 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 boy coasts down a hill on a sled, reaching a level surface at the bottom with a speed of 7.8 m/s. If the coefficient of friction between the sled's runners and snow is 0.045 and the boy and sled together weigh 700 N, how far does the sled travel on the level surface before coming to rest? m

Forces: A 7.60×103 kg transport truck is approaching a 20.0° icy hill that has a bridge at the top that is out of service. The driver immediately slams on the brakes and begins to skid up the hill. The coefficient of kinetic friction between the tires and the hill is 0.350. If there is only 131 m from the bottom of the hill to the bridge what maximum speed can the truck initially be going and still avoid an accident?

WE-4 A 3.00kg block is initially sliding to the right on P (N) 20 a frictionless surface at 7.00m/s. Force P is directed to the left and is applied to the block continuously starting at the initial position as shown below. The magnitude of P varies as shown in the graph to the right. V=7.00m/s 15 10 5. 0 1 2 3 4 (m) a) Find the magnitude of the work done by the force P as the block moves from x-0 to x=4m. b) Find the kinetic encrgy of the block at x-4m. Neglect air resistance (and the surface is frictionless). c) Find the speed of the block at x-4m. P Type here to search %23 直

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?

Problem 16: A 50 kg block and a100 kg block are connected by a string as shown in the figure. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between the 50 kg block and the incline is 0.250. Find the speed of the 100 kg block after it has fallen 1.5 m, causing the 50 kg block to move from position A to B. 50.0 kg 37.0⁰ A 100 kg

Starting from rest, a 91-kg firefighter slides down a fire pole. The average frictional force exerted on him by the pole has a magnitude of 740 N, and his speed at the bottom of the pole is 3.4 m/s. How far did he slide down the pole? Number i Units ho