Calculate the work done in pushing an iron block through a distance of 4.5m against the force of friction equal to 200N. Also state the type of work done
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Answered by
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Work = Force × Displacement
= 200 × cosine of angle × displacement
= 200 × 4.5 × cos180°
= 200 × 4.5 × (-1)
= - 900 Joules
here -ve sign indicates that work is done in the direction opposite to the force.
= 200 × cosine of angle × displacement
= 200 × 4.5 × cos180°
= 200 × 4.5 × (-1)
= - 900 Joules
here -ve sign indicates that work is done in the direction opposite to the force.
Answered by
5
Displacement , s = 4.5 meter
Force , F = -200 N
Work Done = F x s
= 4.5 x -200
= -900 Joules
The work done is Negative.
Work done is negative when force and displacement are in the opposite directions.
Force , F = -200 N
Work Done = F x s
= 4.5 x -200
= -900 Joules
The work done is Negative.
Work done is negative when force and displacement are in the opposite directions.
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