A boy of mass 50 kg runs up a flight of 120 stairs, each measuring a height of 25 cm, in one minute and 40 seconds. If \[g\text{ }=\text{ }10\text{ }m\text{ }{{s}^{-2}}\], the power of the boy is

A boy of mass 50 kg runs up a flight of 120 stairs, each measuring a h

1.	A boy of mass 50 kg runs up a flight of 120 stairs, each measuring a height of 25 cm, in one minute and 40 seconds. If \[g\text{ }=\text{ }10\text{ }m\text{ }{{s}^{-2}}\], the power of the boy is
A.	150 W
B.	750 W
C.	500 W
D.	250 W
Answer» B. 750 W

Discussion

No Comment Found

Related MCQs

Two inclined frictionless tracks, one gradual and the other steep meet at point A from where two stones (I and II) are allowed to slide down from rest, one on each track as shown in figure. Which of the following statements is correct?
An object is dropped from certain height. Which of the following statements is correct about the object when it is about to reach the ground?
Select the incorrect match of disease and its vector/carrier.
Read the following statements carefully.(i) BCG is a triple vaccine, effective against tuberculosis, typhoid and malaria.(ii) Malaria is transmitted by both male and female Anopheles mosquitoes.(iii) Chronic diseases are characterised by drastic long-term effects.(iv) Antibiotics inhibit the bacterial growth by blocking their biochemical pathways.Which two of the above statements are correct?
The sound having too high frequency which cannot be heard by human beings are called:
Antibiotics are used to cure diseases caused by:
Which of the following statement is correct about the cell shown in figure?
Select the incorrect differences between collenchyma and sclerenchyma. Collenchyma Sclerenchyma (i) It is made up of dead cells. Its cells are living. (ii) Lumen or cell cavity is wide. Lumen or cell cavity is usually narrow. (iii) It provides hardness to the region where it occurs. It keeps the organ soft. (iv) Wall thickening is not uniform. Wall thickening is uniform. (v) Pits are simple and straight. Pits are simple, oblique and may be branched.
Four sound waves M, N, O and P are shown in figures below. Which of the following is correct statement?
A.R. Rehman is conducting a musical night in an open auditorium in New York. If a person who is sitting in the auditorium at a distance of 250 m from the stage and the other who is watching the live program on a television set sitting in front of it in Hyderabad, then the person who hear him first is the

A boy of mass 50 kg runs up a flight of 120 stairs, each measuring a height of 25 cm, in one minute and 40 seconds. If \[g\text{ }=\text{ }10\text{ }m\text{ }{{s}^{-2}}\], the power of the boy is

Discussion

No Comment Found

Related MCQs

Reply to Comment