A man with a box on his head is climbing up a ladder. The work done by the man on the box is

Question

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Answer 1

The man carries the box up above to a higher altitude. The potential energy of the box increases. This increase in energy comes from the work done by the man. Hence the work done is positive.

The displacement of the box is in the direction of force exerted by the man on the box - upwards. Hence, the product of the force and displacement is positive. Hence the work is positive.

Answer 2

The man carries the box up above to a higher altitude. The potential energy of the box increases. This increase in energy comes from the work done by the man. Hence the work done is positive.

The displacement of the box is in the direction of force exerted by the man on the box - upwards. Hence, the product of the force and displacement is positive. Hence the work is positive.

A man with a box on his head is climbing up a ladder. The work done by the man on the box is

Positive

Negative

Zero

Undefined

A box is dragged across a floor by a rope which makes an angle of $4 5^{o}$ with the horizontal. The tension in the rope is 100 N. While the box is dragged 10m . The work done is

A man pulls a sledge along a rough horizontal surface by applying a constant force $F$ at an angle $θ$ above the horizontal. In pulling the sledge a horizontal distance $d$ , the work done by the man is:

A man is rowing a boat upstream but, the boat is found to be not moving with respect to the bank. The work done by the man w.r.t. the ground is:

The work done by a man in holding a $15 k g$ suitcase while waiting for a bus for $45$ minutes is

Revise with Concepts

What is Work?

Work and Work Done by a Constant Force

Nature of Work Done

A man with a box on his head is climbing up a ladder. The work done by the man on the box is

Positive

Negative

Zero

Undefined

A box is dragged across a floor by a rope which makes an angle of 45o with the horizontal. The tension in the rope is 100 N. While the box is dragged 10m . The work done is

A man pulls a sledge along a rough horizontal surface by applying a constant force F at an angle θ above the horizontal. In pulling the sledge a horizontal distance d, the work done by the man is:

A man is rowing a boat upstream but, the boat is found to be not moving with respect to the bank. The work done by the man w.r.t. the ground is:

The work done by a man in holding a 15kg suitcase while waiting for a bus for 45 minutes is

Revise with Concepts

What is Work?

Work and Work Done by a Constant Force

Nature of Work Done

A box is dragged across a floor by a rope which makes an angle of $4 5^{o}$ with the horizontal. The tension in the rope is 100 N. While the box is dragged 10m . The work done is

A man pulls a sledge along a rough horizontal surface by applying a constant force $F$ at an angle $θ$ above the horizontal. In pulling the sledge a horizontal distance $d$ , the work done by the man is:

The work done by a man in holding a $15 k g$ suitcase while waiting for a bus for $45$ minutes is