EASY
11th West Bengal Board
IMPORTANT
Earn 100

How is the kinetic energy of a body related to the direction of motion? Can kinetic energy be negative?

Important Questions on Work, Energy and Power

EASY
11th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART I : CLASS 11>Chapter 9 - Work, Energy and Power>EXERCISE>Q 25
Give two examples of conservative forces.
EASY
11th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART I : CLASS 11>Chapter 9 - Work, Energy and Power>EXERCISE>Q 26
Give an example of a force acting on a moving body, yet doing no work.
EASY
11th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART I : CLASS 11>Chapter 9 - Work, Energy and Power>EXERCISE>Q 27
In an inelastic collision of two bodies which of the quantities would remain unchanged total kinetic energy, total momentum and total energy?
EASY
11th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART I : CLASS 11>Chapter 9 - Work, Energy and Power>EXERCISE>Q 28

State if each of the following statements is true or false:

In an inelastic collision of two bodies, the momentum and energy of each body is conserved.

EASY
11th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART I : CLASS 11>Chapter 9 - Work, Energy and Power>EXERCISE>Q 28
Total energy of a system is always conserved, no matter, what internal and external forces on the bodies are present.
EASY
11th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART I : CLASS 11>Chapter 9 - Work, Energy and Power>EXERCISE>Q 28
Work done in the motion of a body over a closed loop is zero for every force in nature.
EASY
11th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART I : CLASS 11>Chapter 9 - Work, Energy and Power>EXERCISE>Q 28
In an inelastic collision the final kinetic energy is always less than the kinetic energy of the system.
EASY
11th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART I : CLASS 11>Chapter 9 - Work, Energy and Power>EXERCISE>Q 29
State the sign of the work done in the following cases: Work done by a man lifting a bucket out of a well by means of a rope tied to the bucket.