Question

In: Physics

A car starts from rest at a stop sign. It accelerates at 4.4 m/s^2 for 6.9...

A car starts from rest at a stop sign. It accelerates at 4.4 m/s^2 for 6.9 s, coasts for 2.3 s, and then slows down at a rate of 3.4 m/s^2 for the next stop sign. How far apart are the stop signs?

Solutions

Expert Solution

The car's journey between the stop signs can be divided into 3 parts.

1. Accelerating part

2. Constant speed part

3. Decelerating part.

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Distance covered in accelerating part

Use formula

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Use the formula to find the final velocity of the first part

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Consider the constant speed part (car is coasting)

Speed = Distance/Time

=========================

Consider the decelerating part

Use formula

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Total distance between the stop signs,

ANSWER:

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genius_generous answered 1 year ago

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