A block of mass m 2.30 kg is pushed a distance d- 8.00 m along a frictionless ho

Question

A block of mass m 2.30 kg is pushed a distance d- 8.00 m along a frictionless horizontal table by a constant applied force of magnitude F 29.0° below the horlizontal as shown in the figure below 16.0 N directed at an angle 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 Need Help? a

Explanation / Answer

Given,

m = 2.3 kg ; d = 8 m ; F = 16 N ; theta = 29 deg

a)Wa = F d cos(theta)

Wa = 16 x 8 x cos29 = 112 J

Hence, Wa = 112 J

b)Normal force does zero work on the block

Wn = 0 J

c)Wg = F d cos90

Wg = 19 x 8 x cos90 = 0 J

Wg = 0 J

d)Wnet = 112 + 0 + 0 = 112 J

hence, Wnet = 112 J

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