## Essential University Physics: Volume 1 (4th Edition)

Published by Pearson

# Chapter 4 - Exercises and Problems - Page 72: 63

#### Answer

F-35A: Yes; $a=.8\ m/s^2$ A-380: No

#### Work Step by Step

We see if there is enough force to raise the F-35A: $F_g=(18,000)(9.81)=177 \ kN$ This is less than the engine's force, so we find: $a = \frac{191,000-177,000}{18,000}=.8 \ m/s^2$ We see if there is enough force to raise the A-380: $F_g=(560,000)(9.81)=5,493 \ kN$ There is not enough force, for this is greater than the thrust of the engine.

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