Physics · Forces and Motion
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A particle of mass moving with velocity V makes head. One elastic collision with another particle of the same mass and initially at rest. The velocity of the first particle after the collision:
- A
2V
- B
-V
- C
+V
- D
Zero
-V: This option is correct. In an elastic collision, the first particle will experience a change in direction and will have a velocity equal in magnitude but opposite in direction to its initial velocity.
Therefore, the correct option is "-V" as the first particle will have a velocity equal in magnitude but opposite in direction to its initial velocity after the elastic collision.
2V: This option is incorrect. In an elastic collision, the relative velocity between the two particles reverses after the collision, but the magnitude of the velocity remains the same.
-V: This option is correct. In an elastic collision, the first particle will experience a change in direction and will have a velocity equal in magnitude but opposite in direction to its initial velocity.
+V: This option is incorrect. The first particle's velocity will not simply remain the same after the elastic collision.
Zero: This option is incorrect. In an elastic collision, the momentum is conserved, so the first particle will continue to have a non-zero velocity.
Tagged under Physics · Forces and Motion · 2009