   Chapter 2, Problem 22P

Chapter
Section
Textbook Problem

The average person passes out at an acceleration of 7g (that is, seven times the gravitational acceleration on Earth). Suppose a car is designed to accelerate at this rate. How much time would be required for the car to accelerate from rest, to 60.0 miles per hour? (The car would need rocket boosters!)

To determine
The time required to accelerate the car.

Explanation

Given info:

The initial velocity of the car is 0 .

The final velocity of the car is 60.0mi/h .

The acceleration of the car is 7g .

Explanation:

Formula to calculate time is,

Δt=vfvia

• a is the acceleration of the car
• vf is the final velocity of the car
• vi is the initial velocity of the car
• Δt is the time interval

Substitute 60.0mi/h for vf , 0 for vi and 7g for a to find Δt

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