Two blocks, A and B (with mass 35 kg and 125 kg, respectively), are connected by a string, as shown in the figure below. The pulley is frictionless and of un negligible mass. The coefficient of kinetic friction between block A and the incline is 0.26. Determine the change in the kinetic energy of block A as it moves from ,a distance of 18 m up the incline (and block B drops downward a distance of 18 m) if the system starts from rest. to

A 50 N force is applied at an angle to the side of a box causing it to slide across a floor. The total work done to move the box 10m is 150 J (joules).  A) what is the angle at which the force was applied?  B) if the box has a weight of 735 N, what is the mass of the box?

Block A (mass 40 kg) and block B (mass 80 kg) are connected by a string of negligible mass as shown in the figure. The pulley is frictionless and has a negligible mass. If the coefficient of kinetic friction between block A and the incline is μ = 0.27 and the blocks are released from rest, determine the change in the kinetic energy of block A as it moves from C to D, a distance of 24 m up the incline. Supporting Materials 37° B V

A 15 kg box is pulled with an applied force of 40 N with a rope at an angle of 30 degreesabove the horizontal with a constant velocity. The box is pulled 10.0 m over a time of 5.0seconds. Determine the work done on the box by the applied force.

Suppose the ski patrol raises a rescue sled and victim, having a total mass of 85.0 kg, up a ? = 62.0° slope at constant speed, as shown in the figure. DO NOT USE THE ANGLE SHOWN IN THE FIGURE! USE THE ANGLE IN THE PROBLEM STATEMENT ABOVE. The coefficient of friction between the sled and the snow is 0.130.   Calculate the normal force on the sled (in N).   Calculate the work done (in J) by the force of friction as the sled moves 30.0 m up the hill. (Hint: Think about the direction of the friction force. Should it be different than the direction shown in the figure?).   Calculate the work done (in J) by the tension force in the rope on the sled over this distance. Calculate the work done (in J) done by the force of gravity on the sled over this distance.

A 5.0-kg block initially moving with 5 m/s to the right along a horizontal surface by a constant horizontal force of 20 N. Find the kinetic energy of the block after it has moved 3.0 m if the surfaces in contact have a coefficient of kinetic friction of 0.15.