Question

2. The car A of mass 1500 kg. travelling at 25 m/s collides with another car B of ma
2o00 kg travelling at 15 m/s in the same direction. After collision the velocity of car A becomes 20 m/
Calculate the velocity of car B after the collision.

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

Hi ✳️✳️

Let ,

mass = m

initial velocity = u

final velocity = v

here ,

m₁= 1500 kg

m₂=1000 kg

u₁ = 25 m/s

u₂ = 15 m/s

v₁ = 20 m/s

we have to find v₂ !!

v₂  is the velocity after collision 

Here is a formula relating the values given ,

m₁u₁+m₂u₂ =  m₁v₁ + m₂+v₂

m₁u₁+m₂u₂ = 1500 × 25  + 1000 ×15

                    = 37500 + 15000  

                     = 52500

 

m₁v₁ + m₂+v₂  = 1500 × 20 + 1000 × v₂

                      = 30000 + 1000v₂

m₁u₁+m₂u₂ =  m₁v₁ + m₂+v₂

52500 = 3000 + 1000v₂

1000v₂ = 52500 - 30000

1000 v₂ = 22500

v₂ = 22500/1000

    = 22.5 m/s

Thus, velocity of car 'B' after collision is 22.5m/s.

Hope it helps ❤️❤️❤️✳️✳️✳️