A 200.kg box is being pushed by a 315N force at an angle of 35 from the horizontal. The box comes to a stop after starting at 22m/s. If the box is pushed along a 55m path, find a. The work done on the box by the applied force.
b. The work done on the box by the force of gravity.
c. The work done on the box by friction.
d. The coefficient of kinetic friction between the box and the ground. ​

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 740 n/m. it is initially at rest on an inclined plane that is at an angle of theta= 26 with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is uk = 0.17. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. the block's initial mechanical energy is 9.472 j. b. if the spring pushes the block up the incline, what distance l in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.