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3 years ago

-A 1000 kg car is rolling down the street at 2.5 m/s. How fast would a 1800 kg car have to collide into it in

Physics

1 answer:

Readme [11.4K]3 years ago

3 0

1.39m/s

Explanation:

Given parameters:

Mass of car M₁ = 1000kg

Velocity V₁ = 2.5m/s

Mass of second car M₂ = 1800kg

Unknown:

Velocity of second car V₂ = ?

Solution:

For the other body to come to rest, the momentum of the colliding cars must be equal and in the opposite direction:

Momentum of car 1 - momentum of car 2 = 0

Momentum of car 1 = Momentum of car 2

M₁V₁ = M₂V₂

The unknown is V₂

1000x2.5 = 1800V₂

V₂ = $\frac{2500}{1800}$ = 1.39m/s

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