A 1000 kg car travels around a circular track at a constant speed. Draw the free-body diagram for the car as viewed from the front of the car. The radius of the path is 200 m, the car is traveling at 25 m/s, and friction is the force keeping the car moving in a circular path. Solve for the coefficient of friction between the wheels and the road.

Problem 2: An applied force of 20 N is used to accelerate an object to the right across a frictional surface. The object encounters 10 N of friction. Use the diagram to determine the normal force, the net force, the coefficient of friction (u) between the object and the surface, the mass, and the acceleration of the object. (Neglect air resistance.) Fnorm Friet =10 N Fapp = 20 N Fgrav=100 N m = a = Fnet=

A sample of blood is placed in a centrifuge of radius 12.0 cm. The mass of a red blood cell is 3.0 x 10-16 kg, and the magnitude of the force acting on it as it settles out of the plasma is 4.0 × 10-¹¹ N. At how many revolutions per second should the centrifuge be operated? rev/s

A person on a sled starts descending from the highest point of a snowy slope with a 30º inclination and 150 m in length. The combined mass of the person and the sled is 90 kg. At the end of the slope, they continue moving on a horizontal track until they stop. The coefficient of friction between the sled and the snow is \( \mu = 0.18 \) in both cases. 1. Draw the forces acting on the sled in each section.  2. Calculate the mechanical energy dissipated due to friction on the inclined section.  3. With what speed does it reach the end of the slope?  4. What distance does the sled travel on the horizontal plane before stopping?

A 9 kg fish hangs from a fishing line. The fish is lowered, such that the tension in the line is 60% of what the tension would be at rest. What is the magnitude of the acceleration of the fish? Answer to 3 sig figs.

(a) What is the coefficient of kinetic friction between the crate and the floor? (Enter your answer to at least three decimal places.) (b) If the 250-N force is instead pulling the block at an angle of 20.0° above the horizontal, as shown in the figure b, what will be the acceleration of the crate? Assume that the coefficient of friction is the same as that found in part (a). m/s2