Question

A particle of mass 10 kg moving eastwards with a speed 5
ms⁻¹ collides with another particle of the same mass moving
north-wards with the same speed 5 ms⁻¹. The two particles
coalesce on collision. The new particle of mass 20 kg will
move in the north-east direction with velocity
(a) 10 ms⁻¹ (b) 5 ms⁻¹
(c) (5 / √2)ms⁻¹ (d) none of these

Answer 1

Answer:

I think option c is the answer

Answer 2

Answer:

Answer is (C) (5/√2) ms-1.

Here i mν + j mν = 2m vector V That is vector V = ν/2[l + j] Hence V = ν/2 x √2 = ν/√2 . Here ν = 5ms-1

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