K.E is conserved in:
Correct answer: C. Elastic collision
- A. Inelastic collision
- B. All collisions
- C. Elastic collision
- D. None of these
Explanation
An elastic collision is one in which both kinetic energy and linear momentum are conserved. In contrast, in an inelastic collision, kinetic energy is not conserved as it is transformed into other forms of energy. Therefore, the correct answer is 'Elastic collision'. 'Inelastic collision' and 'All collisions' are incorrect because they do not accurately describe the conditions under which kinetic energy is conserved. 'None of these' is incorrect because elastic collisions do conserve kinetic energy.
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About Force and Motion
Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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