Advertisements
Advertisements
Question
Complete the following sentences:
Kilowatt is the unit of ....... and kWh is the unit of
Solution
Kilowatt is the unit of power and kWh is the unit of energy
APPEARS IN
RELATED QUESTIONS
Soni says that the acceleration in an object could be zero even when several forces are acting on it. Do you agree with her? Why?
The moon is revolving around the earth in a circular path. How much work is done by the moon?
State the S.I. unit of energy.
Give reasons for the following. No work is done if a man is pushing against a wall.
Express joule in terms of erg.
A weight lifter lifted a load of 200 kgf to a height of 2.5 m in 5 s. Calculate:
- the work done, and
- the power developed by him. Take g = 10 N kg-1
Is it possible that a force is acting on a body but still the work done is zero? Explain giving one example.
When is the work done by a force on a body : (a) positive, (b) negative, and (c) zero?
The work done by a force acting obliquely is given by the formula : W = F cos θ ✕ s. What will happen to the work done if angle θ between the direction of force and motion of the body is increased gradually? Will it increase, decrease or remain constant.
The velocity of a car increases from 54 km/hr to 72 km/hr. How much is the work done if the mass of the car is 1500 kg?
Its moment of a force scalar or a vector quantity?
Give two examples of couple action in our daily life.
A uniform circular motion is an accelerated motion. Justify it.
A boy pulls a box up to 10 m with a force of 5 kgf. Calculate the work done by him.
Fill in the boxe to show the corresponding energy transformation.
