Skip to content
Philoid
Browse Saved
Back to chapter
Physics
11. Work and Energy
Home · Class 9 · Physics · NCERT - Science · 11. Work and Energy
Prev
Next
Q1 of 33 Page 152

What is the kinetic energy of an object?

The kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.

The heavier a thing is, and the faster it moves, the more kinetic energy it has.


More from this chapter

All 33 →
3

Define 1 J of work.

4

A pair of bullocks exerts a force of 140 N in a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field?

2

Write an expression for the kinetic energy of an object.

3

The kinetic energy of an object of mass ‘m’ moving with a velocity of 5 m s-1 is 25 J. What will be its kinetic energy when its velocity is doubled? What will be its kinetic energy when its velocity is increased three times?

Questions · 33
11. Work and Energy
1 1 2 3 4 1 2 3 1 2 3 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
Back to chapter
About Contact Privacy Terms
Philoid · 2026
  • Home
  • Search
  • Browse
  • Quiz
  • Saved