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Get Full Access to College Physics - 1 Edition - Chapter 7 - Problem 41pe
Get Full Access to College Physics - 1 Edition - Chapter 7 - Problem 41pe

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# Solved: (a) How long would it take a 1.50×105 -kg airplane ISBN: 9781938168000 42

## Solution for problem 41PE Chapter 7

College Physics | 1st Edition

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Problem 41PE

(a) How long would it take a 1.50×105 -kg airplane with engines that produce 100 MW of power to reach a speed of 250 m/s and an altitude of 12.0 km if air resistance were negligible? (b) If it actually takes 900 s, what is the power? (c) Given this power, what is the average force of air resistance if the airplane takes 1200 s? (Hint: You must find the distance the plane travels in 1200 s assuming constant acceleration.)

Step-by-Step Solution:

Problem 41PE

Solution 41 PE

Step 1:

In this question, we need to find time taken by airplane

In the second part , we need to find the power if time taken is In the third part , with the power obtained in part two, we need to find average force of air

resistance if time taken is Data given

Mass of airplane Power Final velocity Height Time taken Time taken Step 2 :

We shall find the work done by the airplane

It is given by Substituting values we get  Step 3 :

We need to find time taken by airplane

This can be obtained using relation Substituting values we get  Thus we have time taken as Step 4 :

we need to find the power if time taken is This can be obtained using relation Substituting values we get   Hence the power required for 900 s is Step 5 of 7

Step 6 of 7

##### ISBN: 9781938168000

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