You are loading a refrigerator weighing 2.29×103 N onto a truck, using a wheeled cart. The refrigerator is raised 1.00 m to the truck bed when it is rolled up a ramp.Calculate the minimum work that must be done by the force you apply if the ramp is at an angle with the horizontal of 35.0°.Calculate the minimum work that must be done by the force you apply if the ramp is at an angle with the horizontal of 14.0°.

A 5.40-kg box rests on a horizontal surface. The coefficient of kinetic friction between the box and surface is µk 0.410. A horizontal force pulls the box at constant velocity for 23.0 cm. Find the work done by the applied horizontal force. Submit Answer Tries 0/10 Find the work done the frictional force. Submit Answer Tries 0/10 Find the work done by the net force. Submit Answer Tries 0/10

A box slides down a plank of length d that makes an angle of θ with the horizontal as shown. μk is the kinetic coefficient of friction and μs is the static coefficient of friction. Enter an expression for the minimum angle θ (in degrees) the box will begin to slide.  Enter an expression for the nonconservative work done by kinetic friction as the block slides down the plank. Assume the box starts from rest and θ is large enough that it will move down the plank.  For a plank of any length, at what angle θ (in degrees) will the final speed of the box at the bottom of the plank be 0.55 times the final speed of the box when there is no friction present? Assume μk = 0.35.

A block of mass m = 2.50 kg is pushed d = 2.70 m along a frictionless horizontal table by a constant applied force of magnitude F = 18.0 directed at an angle ? = 25.0° below the horizontal (a) Determine the work done by the applied force.= J (b) Determine the work done by the normal force exerted by the table.= J (c) Determine the work done by the force of gravity.= J (d) Determine the work done by the net force on the block.= J