Question

A bullet is fired vertically upward a velocity of 80m/s to what height will the bullet rise above the point of projection​

Answer 1

Answer:

The bullet will rise 320 meters above the point of projection.

Explanation:

Assuming that air friction is negligent we can use the kinematic equation:

$v_{2} ^2=v_{1} ^2+2(-a)d\\0\frac{m^2}{s^2} =6400\frac{m^2}{s^2} +2(-10\frac{m}{s^2} )d\\-6400\frac{m^2}{s^2} =(-20\frac{m}{s^2}) d\\320m=d$

*acceleration is negative (-a) as it is acting in the opposite direction of the motion of the bullet.*