block of mass m = 2.50 kg is pushed d = 2.10 m along a frictionless horizontal table by a constant applied force of magnitude  F = 14.0 N directed at an angle ? = 25.0° below the horizontal as shown in the figure below. (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

A force given by (6i – 3j) N acts on an object experiencing a displacement given by (3i – j) m.  Determine the work done by the force.

A block of mass m = 4.00 kg is pushed a distance d = 2.50 m along a frictionless horizontal table by a constant applied force of magnitude F = 16.0 N directed at an angle θ = 28.0° below the horizontal as shown in the figure below. (a) Determine the work done on the block by the applied force. (b) Determine the work done on the block by the normal force exerted by the table. (c) Determine the work done on the block by the force of gravity. (d) Determine the work done by the net force on the block.

An object of mass 3.00 kg is subject to a force E, that varies with the position as in the figure below. (a) Find the work done by the force on the object as it moves from x = 0 to x = 5.00 m. (b) Find the work done by the force on the object as it moves from x = 5.00 m to x = 12.0 m. (c) Find the work done by the force on the object as it moves from x = 12.0 m to x = 17.0 m. (d) If the object has a speed of 0.400 m/s at x 0, find its speed at x = 5.00 m and its speed at x = 17.0 m. F, (N) 4 3 2 x (m) 4 8 10 12 14 16 18 20