A bomb at rest explodes into two pieces of the same mass. The two pieces will
Correct answer: B. move with the same speed in opposite directions
- A. be at rest
- B. move with the same speed in opposite directions
- C. move with different velocities
- D. move with the same velocity
Explanation
According to the law of conservation of momentum, the total momentum before and after the explosion remains constant. Since the two pieces have the same mass and move in opposite directions, they must have equal and opposite momenta, ensuring the conservation of momentum.Incorrect Options Explanation:(a) be at rest: This contradicts the principle of conservation of momentum.(c) move with different velocities: The two pieces must have the same velocity magnitude due to conservation of momentum.(d) move with the same velocity: They move with the same speed but in opposite directions, so their velocities are equal in magnitude but opposite in direction.
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About Work and Energy
Work transfers energy when a force causes displacement, while kinetic energy, gravitational potential energy and power describe motion, position and the rate of energy transfer. The work-energy theorem links net work with change in kinetic energy, and efficiency accounts for energy losses rather than treating them as energy destruction.
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