MEDIUM
11th ICSE
IMPORTANT
Earn 100

State and explain work-energy theorem.

Important Questions on Work, Power and Energy

EASY
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 10 - Work, Power and Energy>QUESTIONS>Q 8
What do you mean by potential energy? Give two examples of P.E. other than the gravitational potential energy.
MEDIUM
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 10 - Work, Power and Energy>QUESTIONS>Q 9
Define potential energy. Derive an expression for potential energy stored in a system of a block attached to massless spring when the block is pulled from its equilibrium position.
MEDIUM
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 10 - Work, Power and Energy>QUESTIONS>Q 10
Mention some of the different forms of energy and discuss them briefly.
MEDIUM
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 10 - Work, Power and Energy>QUESTIONS>Q 11
Give a brief account of mass-energy equivalence. What is its significance in physics?
MEDIUM
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 10 - Work, Power and Energy>QUESTIONS>Q 12
Define mechanical energy of a body. Show that mechanical energy is conserved when a body falls freely under gravity.
MEDIUM
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 10 - Work, Power and Energy>QUESTIONS>Q 13
What is meant by collision? Give a brief account of elastic and inelastic collisions.
HARD
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 10 - Work, Power and Energy>QUESTIONS>Q 14
Prove that in an elastic collision in one dimension, the relative velocity of approach before impact is equal to the relative velocity of separation after impact.
MEDIUM
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 10 - Work, Power and Energy>QUESTIONS>Q 15

Two bodies of masses m1 and m2 are moving with velocities u1 and u2 respectively in the same direction, collide elastically with each other. Calculate their velocities after the collision. Discuss what happens, when both the colliding bodies have the same mass.