Two bodies of masses 8 kg and 5 kg travelling in the same...
Two bodies of masses 8 kg and 5 kg travelling in the same direction with speeds x m/s and 2 m/s respectively collide. If after collision, they move together with a speed of 3.85 m/s, find, correct to the nearest whole number, the value of x.
2
5
8
13
Correct answer is B
(m1v1+m2v2)=(m1+m2)v (Inelastic momentum)
8x+(5×2)=(8+5)×3.85
8x+10=13×3.85=50.05
8x=50.05−10=40.05
x≊
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