H2P-354
Relative speed in elastic collisions
H2 Physics · JC 2 · Hard · Relative speed in elastic collisions
A 0.40 kg trolley moves to the right at 2.0 m s⁻¹ and collides elastically in a straight line with a 0.20 kg trolley moving at 0.50 m s⁻¹ in the same direction on a smooth track. Using conservation of momentum and the relative speed condition, what is the speed of the 0.20 kg trolley immediately after the collision?
- 0.50 m s⁻¹
- 1.5 m s⁻¹
- 2.0 m s⁻¹
- 2.5 m s⁻¹
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