A 1500 kg car originally moving at 10 m/s crashes into a wall and comes to rest in 0.25 s. What is the magnitude of the impulse given to the

Question

A 1500 kg car originally moving at 10 m/s crashes into a wall and comes to rest in 0.25 s. What is the magnitude of the impulse given to the car?
a. 37.5 kg m/s
b. 150 kg m/s
c. 15,000 kg m/s
d. 60,000 kg m/s

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Nho 1 year 2021-07-23T11:33:46+00:00 1 Answers 7 views 0

Answers ( )

  1. minhkhang
    0
    2021-07-23T11:35:22+00:00
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    Answer:

    Option C

    Explanation:

    Impulse is the change in momentum in an object hence given by

    Impulse=F∆t

    Impulse=∆p=m(v-u)

    Here, F is force applied, t is rime, m is mass, v is final velocity and u is initial velocity

    Given that the question has time but no magnitude of the force, we use the sexond equation.

    Taking forward velocity as negative then u=-10 m/s, also since the car comes to rest, final velocity is 0 m/s. Substititing mass with 1500 kgs then

    Impulse=1500(0–10)=15000 kg.m/s

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