7.76 Problem 7.76 Part A Caloulate the average force exerted on the car by the b

Question

7.76 Problem 7.76 Part A Caloulate the average force exerted on the car by the bamier of new automobile modets Cars are Express your answer to two signiticant figures and include the appropriate units. Enter positive value if the direction of the force is in the direction of the initial velocity and negative value if the direction of the force is in the direction opposite to the initial velocity 48 km/b A new model of mass 1700 kg takes 0.18 from the time of impact until it is brought to rest Calculate the average acceleration of the car duning the impact in s Express your answer using two significant figures. Enter positive initial velocity and negative value if the direction of the acceleration is in the direction opposite to the intsal velocity Type here to

Explanation / Answer

here,

initial speed , u = 48 km/h

u = 13.33 m/s

time taken , t = 0.18 s

let the accelration be a

v = u + a * t

0 = 13.33 + a * 0.18

a = - 74.07 m/s^2

mass , m = 1700 kg

a)

the average force exerted , F = m * a

F = 1700 * 74.07 = 1.26 * 10^5 N

b)

the average accelration , a = - 74.1 m/s^2 = 7.55 * g

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