Two objecrts, each of mass 1.5kg, are moving in the same straight line but in opposite directions.  The velocity of each object is 2.5m/s before the collision during which they stick together. What will be the collision? 

Asked by shoubikdas2017 | 9th Jul, 2019, 09:21: AM

Expert Answer:

m1 = m2 = 1.5 kg 
u1 = 2.5 m/s 
u2 = -2.5 m/s 
Final velocity after collision is v = ? 
 
By law of conservation of linear momentum,
 
m1u1 + m2u2 = m1v1 + m2v2 
 
Velocities of both masses will be same after collision,
 
1.5 (2.5) + 1.5 (-2.5) = 1.5 x v + 1.5 x v
0 = 1.5 x v 
Thus, v = 0 m/s 
 
This means, both the objects will come to rest after collision. 

Answered by Shiwani Sawant | 9th Jul, 2019, 10:09: AM

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