An object of mass 2kg moving with a velocity 3ms -1 collides head-on with another...
PHYSICS
WAEC 2008
An object of mass 2kg moving with a velocity 3ms-1 collides head-on with another object of mass 1kg moving in the opposite direction with a velocity of 4ms-1. If the objects stick together after collision, calculate their common speed.
- A. 0.60ms-1
- B. 0.67ms-1
- C. 2.00ms-1
- D. 3.33-1
Correct Answer: B. 0.67ms-1
Explanation
\(M_1V_1 - (M_2V_2) = V(M_1 + M_2)\)
2 x 3 - 1 x 4 = V(2 + 1)
V = \(\frac{2}{3}\)
= 0.67ms-1
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