   Chapter 6, Problem 13P

Chapter
Section
Textbook Problem

A car is stopped for a traffic signal. When the light turns green, the car accelerates, increasing its speed from 0 to 5.20 m/s in 0.832 s. What are the magnitudes of (a) the linear impulse and (b) the average total force experienced by a 70.0-kg passenger in the car during the time the car accelerates?

(a)

To determine
The magnitude of the linear impulse.

Explanation

Given Info:

The initial velocity of the car is 0m/s .

The final velocity of the car is 5.20m/s .

The time taken for the acceleration is 0.832s .

The mass of the passenger is 70.0kg .

Formula to calculate the magnitude of the linear impulse is,

I=m(vfvi)

• m is the mass of the passenger
• vf is the final velocity of the car
• vi is the initial velocity of the car

Substitute 70.0kg for m , 5.20m/s for vf and 0m/s for vi to find the magnitude of the linear impulse,

I=70

(b)

To determine
The magnitude of the average total force experienced by the passenger at the time of acceleration.

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