At the point of contact, work done by the normal reaction when a person climbs up the stairs is

Positive

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Negative

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Zero

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

None of these

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C Zero
When the person is climbing up the stairs, he is applying force in the downward direction and the normal reaction force is in the upward direction. Here the displacement is also in the upward direction. Hence the normal reaction and displacement are in the same direction, which means work done by the force is positive.

Suggest Corrections

Similar questions

Q. At the point of contact, work done by the normal reaction when a person climbs up the stairs is

Q. Work done by the normal reaction when a person climbs up the stairs is:

It takes 20 s for a person A of mass 50 kg to climb up the stairs, while another person B of same mass does the same in 15 s.Compare the (i) work done, and (ii) power developed by the persons A and B.

A boy of mass m climbs up the stairs of vertical height h.

(a) What is the work done by the boy against the force of gravity?

(b) What would have been the work done if he uses a lift in climbing the same vertical height?

A boy of mass 40kg climbs up the stairs and reaches the roof at a height 8m in 5s.Calculate :

1-the force of gravity acting on the boy

2-the work done by him against the gravity

3-the power sent by the boy

(take g=10m 1/s²)

Join BYJU'S Learning Program