After hitting a long fly ball that goes over the right fielder's head and lands in the outfield, the batter decides to keep going past second base and try for third base. The 59 kg player begins sliding 3.40 m from the base with a speed of 4.35 m/s. If the player comes to rest at third base, what was the coefficient of kinetic friction between the player and the ground?

A box (400 kg) sits inside the trailer of a semitruck traveling at a speed of 25 m/s (~ 55 mph). Suddenly, a car in front of the truck stops in the road. The driver of the truck hits the brakes to bring the truck to a stop. Assume that the coefficient of static friction µs = 0.7 between the box and the floor of the trailer. Assume g = 10 m/s2.a) When the truck slows down while traveling left, what is the direction of the friction force on box 1 (right, left, none)? b) When the truck is slowing down, what is the maximum magnitude of the static friction force on box 1 (to slow it down with the truck and not let it slide)? N c) When the truck is slowing down, what is the maximum magnitude of the truck's acceleration such that box 1 does not slide? m/s2 d) What is the minimum time for the truck to stop such that box 1 does not slide? Use your maximum acceleration from the previous problem.  s e) Given this minimum time, what is the minimum distance for the truck to stop without box 1…

You and your friend Peter are putting new shingles on a roof pitched at 21°. You're sitting on the very top of the roof when Peter, who is on the edge of the roof, 5.5 m away, asks you for the box of nails. Rather than carry the 2.5 kg box of nails down to Peter, you decide to give the box a push and have it slide down to him. If the coefficient of kinetic friction between the box and the roof is 0.54, with what speed should you push the box to have it gently come to rest right at the edge of the roof? Express your answer with the appropriate units. ► View Available Hint(s) v = μA Value Submit Units ?

The speed of a 200-g toy car at the bottom of a vertical circular portion of track is 7.25 m/s. If the radius of curvature of this portion of the track is 52.5 cm, what are the magnitude and direction of the force the track exerts on the car? (Assume the car's path is in the clockwise direction.)