If momentum is increased by two times K.E increases by
Correct answer: C. Four times
- A. Two times
- B. 3 times
- C. Four times
- D. Remains
Explanation
Correct. Kinetic energy (KE) = p² / (2m). If momentum (p) is doubled (2p), then: KE' = (2p)² / (2m) = 4p² / (2m) = 4(p² / (2m)) = 4KE Thus, KE increases by four times.
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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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