A car in motion hits and gets crashed into a tree trunk, what is NOT conserved?
Correct answer: A. Kinetic energy alone
- A. Kinetic energy alone
- B. Momentum alone
- C. Momentum and kinetic energy both
- D. Neither kinetic energy nor momentum
Explanation
The momentum is not conserved due to external forces such as reaction force of the tree acting on the car once it hits the tree. Also as it is inelastic collisions so kinetic energy will also not be conserved
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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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