Question 2, chap 109, sect 2. part 1 of 2 8 points In a particular crash test, a

Question

Question 2, chap 109, sect 2. part 1 of 2 8 points In a particular crash test, an automobile of mass 1382 kg collides with a wall and bounces back off the wall. The x components of the initial and final speeds of the automobile are 21 m/s and 2.8 m/s, respectively. If the collision lasts for 0.09 s, find the magnitude of the impulse due to the collision. Answer in units of kg - m/s. Question 3, chap 109, sect 2. part 2 of 2 7 points Calculate the magnitude of the average force exerted on the automobile during the collision. Answer in units of N

Explanation / Answer

here,

mass , m = 1382 kg

initial speed , u = - 21 m/s

final speed , v = 2.8 m/s

the magnitude of impulse , I = m * ( v - u)

I = 1382 * ( 2.8 + 21) kg.m/s

I = 3.3 * 10^4 kg.m/s

the magnitude of average force , F = I/t

F = 3.3 * 10^4 /0.09 N

F = 3.67 * 10^5 N

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