EASY
9th CBSE
IMPORTANT
Earn 100

Power is of doing work with respect to time.

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Important Questions on Work and Energy

MEDIUM
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 5 - Work and Energy>Formative Assessment>Q 6

1 W s = _____ J. (Choose from 1,10,100)

EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 5 - Work and Energy>Formative Assessment>Q 7

Define power. What is its SI unit? Give a relation-ship between power, force, and velocity.

EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 5 - Work and Energy>Formative Assessment>Q 8
If a lift can move a load of 5000 kg (including the mass of lift) with a speed of 1 m s-1, what is the power of the lift? [Take g=10 m s-2]
EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 5 - Work and Energy>Formative Assessment>Q 9
If a man lifts a load up with the help of a rope such that it raises a load of mass 50 kg to a height of 20 m in 100 seconds. Find the power of man. (Take g=10 m s-1)
EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 5 - Work and Energy>Formative Assessment>Q 10

Find the time required to spent energy of 100 J by a machine of power 10 W?

EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 5 - Work and Energy>Formative Assessment>Q 1

What is the SI unit of work?

(Choose from: joule/ erg/ dyne)

EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 5 - Work and Energy>Formative Assessment>Q 2

Name the type of energy stored in a stretched spring.

(Choose from: Elastic potential energy/ Elastic kinetic energy/ Gravitational potential energy)

EASY
9th CBSE
IMPORTANT
Modern's abc+ Of Science - Physics For Class IX>Chapter 5 - Work and Energy>Formative Assessment>Q 3
Name the type of energy possessed by an aeroplane flying at an altitude.