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tankster tankster
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4 years ago
If you walk 5.0 m horizontally forward at a constant velocity carrying a 10 N object, the amount of work you do is
A) more than 50 J.
B) equal to 50 J.
C) less than 50 J, but more than 0 J.
D) zero.
Textbook 

Physics


Edition: 4th
Author:
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Raj.SRaj.S
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4 years ago
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More questions for this book are available here
D

Concept: Work done = dot product of Force and displacement

Weight of object will be downward.

and motion is in horizontal direction.

According to newton's Second law motion

Moving with constant velocity in horizontal means no Net force in Horizontal direction.

Angle between direction of weight force and direction of motion = 90



\(Work= F*d \: cos\theta\)

\(Work= F*d \: cos90^{\circ}\)

Work = 0
1

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2 months ago
Thanks!
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