A porter with a suitcase on his head is climbing up steps with uniform speed. The work done by the "weight of the suitcase" on the suitcase is

Positive

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Negative

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Zero

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Undefined

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Solution

The correct option is A Positive
Force and Displacement are in same direction. So, work done in positive.

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Similar questions

Q. In which of the following cases is the work done positive or zero or negative?
a) Work done by the porter on a suitcase in lifting it from the platform on to his head.
b) Work done by the force of gravity on suitcase as the suitcase falls from porter's head.
c) Work done by the porter standing on platform with suitcase on his head.
d) Work done by force of gravity on a ball thrown up vertically up into the sky.
e) Work done by force applied by hands of a man swimming in a pond.

A porter lifts a suitcase weighing 20 kg from the platform and puts it on his head 2.0 m above the platform. Calculate the work done by the porter on the suitcase.

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Q. Consider a porter standing on a platform with a suitcase which presses his head with a force of 200 N. If this force is taken to be action, then the reaction force is exerted by:

Q. Consider a porter standing on a platform with a suitcase on his head with a force of 200 N. If this force is the action force, then the reaction force is exerted by:

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A porter with a suitcase on his head is climbing up steps with uniform speed. The work done by the "weight of the suitcase" on the suitcase is

The correct option is A PositiveForce and Displacement are in same direction. So, work done in positive.

The correct option is A Positive
Force and Displacement are in same direction. So, work done in positive.