Question

Please show ALL work ;)

→ A) What is the off speed for a plane with an acceleration of 4.2 m/s2 that can take off after traveling 300 yds? ► B) A tripod on the ground, holds an eyepiece turned upward such that when one looks through the eye piece, they can see the top the building. If the angle between the eye piece and the horizontal is 38 degrees, the ladder is 7m long and the building is 6 m high, how high is the eyepiece above the ground?

Answer 1

A)

Given:

$a=4.2\ \text{m/s}^2\\ S=300\ \text{yds}=274\ \text m$

Since it is a constant accelerated motion, the final velocity during take off is,

$v=\sqrt{2aS}\\ =\sqrt{2\times4.2\times300}\ \text{m/s}\\ =48\ \text{m/s}$