Question

A car travels along a straight road. It starts from rest and accelerated in two stages....

A car travels along a straight road. It starts from rest and accelerated in two stages. Each stage takes the same amount of time. In the first stage, the car speeds up with acceleration 3.0 m/s^2. At the end of the second stage, the cars velocity magnitude is 2.5 times greater than it is at the end of the first stage. Find the acceleration magnitude in the second stage.

Homework Answers

Answer #1

Consider the first stage

Given that the car starts from rest and speeds up with an acceleration of

Use formula

------(1)

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

Given that both stages take the same amount of time.

At the end of the 2nd stage, the velocity is 2.5 times greater than it is at the end of first stage

--------(2)

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

Consider the second stage

Use formula

Put (2) in the above equation

Put (1) in the above equation

ANSWER:

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