A 10.1 kg box is released on a 49.9° incline and accelerates down the incline at 0.07 m/s². What is the coefficient of kinetic friction between the two surfaces?

the kinetic friction force that a horizontal surface exerts on a 60 kg object is 50 N. If the initial speed of the object of 25 m/s, what of the distance that it will slide before coming to a stop?

A hockey puck with mass 0.167 kg is pushed across the ice with a constant force of 0.56 N. The coefficient of kinetic friction between the puck and the ice is 0.13. After a distance of 2.3 m, what is the puck's speed in m/s?

A 1520-N crate is to be held in place on a ramp that rises at 30.0° above the horizontal (see figure). The massless rope attached to the crate makes a 22.0° angle above the surface of the ramp. The coefficients of friction between the crate and the surface of the ramp are uk = 0.450 and us = 0.650. The pulley has no appreciable mass or friction. What is the MAXIMUM weight w that can be used to hold this crate stationary on the ramp? w = ? Crate 22.0 Ramp 30,0

The 60-kg crate is projected along the floor with an initial speed of vo = 6.8 m/s at x = 0. The coefficient of kinetic friction is μk = 0.55. Calculate the time t required for the crate to come to rest and the corresponding distance x traveled. Answers: t = Hk X = i VO S m

A box with with a mass m = 2kg is being pushed up a ramp by an unknown pushing force Fp. The coefficient of static friction between the box and interface is 0.7. The coefficient of kinetic friction between the box and interface is 0.6. The incline of the ramp is 15 degrees. The velocity of the box is constant. The surface of the ramp is 12 m. Fp is removed when the box reaches the top of the ramp. What is the acceleratin of the box after Fp is removed?

A driver in a car traveling at 23 m/s slams on the brakes and skids to a stop. If the coefficient of friction between the tires and the horizontal road is 0.70, how long will the skid marks be?

A driver in a 1000 kg car traveling at 20 m/s slams on the breaks and skids to a stop. If the coefficient of friction between the tires and the horizontal road is 0.80, how long will the skid marks be?

The 60-kg crate is projected along the floor with an initial speed of vo = 6.8 m/s at x = 0. The coefficient of kinetic friction is Uk = 0.55. Calculate the time t required for the crate to come to rest and the corresponding distance x traveled. Answers: t= Mk X= 1.26 i 5.17 VO x S m

A 2.0 kg piece of wood slides on a curved surface . The sides of the surface are perfectly smooth, but the rough horizontal bottom is 30 m long and has a kinetic friction coefficient of 0.20 with the wood. The piece of wood starts from rest 4.0 m above the rough bottom. (a) Where will this wood eventually come to rest? (b) For the motion from the initial release until the piece of wood comes to rest, what is the total amount of work done by friction?