EASY
9th CBSE
IMPORTANT
Earn 100

Write the formula for work done on a body when it moves at an angle of 'θ' to the direction of force applied. State the meaning of each symbol used.

Important Questions on Work and Energy

MEDIUM
9th CBSE
IMPORTANT
Secondary Physics>Chapter 5 - Work and Energy>TEST YOURSELF>Q 6
A boy weighing 40 kg climbs up a tree of height 5 m. Calculate the amount of work done (g = 9.8 ms2).
MEDIUM
9th CBSE
IMPORTANT
Secondary Physics>Chapter 5 - Work and Energy>TEST YOURSELF>Q 7
Calculate the work done by a man holding a suitcase weighing 5 kg in his hand.
EASY
9th CBSE
IMPORTANT
Secondary Physics>Chapter 5 - Work and Energy>TEST YOURSELF>Q 8
A force of 500 N moves a body through a distance of 100 cm. Calculate the work done by the force.
MEDIUM
9th CBSE
IMPORTANT
Secondary Physics>Chapter 5 - Work and Energy>TEST YOURSELF>Q 9
Calculate the work done if a force of 1000 N causes a displacement of 45 m such that the force makes an angle of 60° with the displacement.
MEDIUM
9th CBSE
IMPORTANT
Secondary Physics>Chapter 5 - Work and Energy>TEST YOURSELF>Q 10
A man does a work of 5 kJ in lifting a 20 kg bucket from ground floor to the top floor of the building. Calculate the height of the building. Take g= 9.8 m/s2.
EASY
9th CBSE
IMPORTANT
Secondary Physics>Chapter 5 - Work and Energy>TEST YOURSELF>Q 1

What is energy?

EASY
9th CBSE
IMPORTANT
Secondary Physics>Chapter 5 - Work and Energy>TEST YOURSELF>Q 2
State and define SI unit of energy.
EASY
9th CBSE
IMPORTANT
Secondary Physics>Chapter 5 - Work and Energy>TEST YOURSELF>Q 3

Name the energy source which is not due to sun.