If two equal masses are in motion with same individual speeds, we can conclude that:
Correct answer: B. Their momentums can be different from each other
- A. Their momentums are same
- B. Their momentums can be different from each other
- C. Their kinetic energies are different from each other
- D. Their total energies are same
Explanation
This is the accurate statement. As explained above, momentum is a vector. Even if the masses and speeds are identical, the directions of motion can vary. This variation in direction leads to different momentum vectors. For example, one mass could be moving east, and the other north. In this case, their momentums are not the same.
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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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