Question

Fireworks are fired at an angle of 82degrees with the horizontal. They are expected to explode about 100 m in the air, 4.8 secs after they are fired. What is the initial velocity of a shell fired from ground level.

I think I have to find the vertical and horizontal components first but I don't know where to go after I do so. Thanks for any help.

Answer 1

use physics

Answer 2

9'1

Answer 3

Well, the formula to answer this is 100=-16(4.8)^2+VoSin(82°)4.8+0
You can find Vo based off of this but, it’s been 9 years so I don’t think you really need this anymore.