A 1500 kg truck travelling north at 60 km/hr collides with a 1200 kg car moving east at 15km/hr. If the two cars remain locked together afte

Question

A 1500 kg truck travelling north at 60 km/hr collides with a 1200 kg car moving east at 15km/hr. If the two cars remain locked together after impact, with what velocity do they move immediately after the collision.​

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Kim Cúc 3 years 2021-07-16T20:17:24+00:00 1 Answers 56 views 0

Answers ( )

  1. Dau
    0
    2021-07-16T20:18:54+00:00
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    Answer:

    33.33j+6.67i km/hr

    Explanation:

    From the law of conservation of momentum,

    Applying,

    mu+m’u’ = V(m+m’)…………… Equation 1

    Where m = mass of the truck, m’ = mass of the car, u = initial velocity of the truck, u’ = initial velocity of the car, V = Final velocity.

    Note: let j represent the north, and i  represent the east

    From the question,

    Given: m = 1500 kg, u = 60j, m’ = 1200 kg, u’ = 15i

    Substitute these values into equation 1

    1500*60j+1200*15i = V(1500+1200)

    90000j+18000i = 2700V

    V = (90000j+18000i)/2700

    V = 33.33j+6.67i km/hr

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