A block of mass m = 2.10 kg is pushed a distance d = 4.20 m along a frictionless

Question

A block of mass m = 2.10 kg is pushed a distance d = 4.20 m along a frictionless horizontal table by a constant applied force of magnitude F = 16.0 N directed at an angle = 29.0° below the horizontal as shown in the figure below.

(a) Determine the work done on the block by the applied force. J

(b) Determine the work done on the block by the normal force exerted by the table. J

(c) Determine the work done on the block by the force of gravity. J

(d) Determine the work done by the net force on the block. J

Explanation / Answer

a) Fcos(29.0)*4.2 = 58.774J

b)Ncos(90)*4.2 =0

c)mgcos(90)*4.2 = 0

d)work done by net force = Fcos(29.0)*4.2=58.774J

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