Joined

·
2,912 Posts

Horizontally fired projectile fired 5 feet above the ground, it travels 290 feet from the point its fired before it hits the ground.

What is the time and initial velocity?

I will update with a picture.

1 - 5 of 5 Posts

Joined

·
2,912 Posts

Horizontally fired projectile fired 5 feet above the ground, it travels 290 feet from the point its fired before it hits the ground.

What is the time and initial velocity?

I will update with a picture.

Joined

·
2,912 Posts

Knowns:

IGNORE AIR RESISTANCE

-acceleration due to gravity 9.8m/ss

-intial height 5ft

-final height 0ft.

Now to find time it would be the same as finding how long it took an object to fall from 5ft.

would time be .5577 seconds? if t= square root of (2H/g)

Joined

·
127 Posts

Once you have the time needed to fall, you'll know the time it took to travel horizontally. Then just divide the horizontal distance by your time there, and you should get the initial velocity

Once I figure out how to convert from your inanely annoying units (

Joined

·
68 Posts

Quote:

looks like all you need is to change accel... which is 32.2 ft/s^2

Joined

·
5,037 Posts

d / (1/2)(a) = (t^2)

5 / (1/2)(32.2) = (t^2)

t = 0.249 seconds

d = (Vi)(t)

Vi = d / t

Vi = 1164.659 feet per second.

You're on your own for significant figures, though.

1 - 5 of 5 Posts

Join the discussion

Overclock.net

A forum community dedicated to overclocking enthusiasts and testing the limits of computing. Come join the discussion about computing, builds, collections, displays, models, styles, scales, specifications, reviews, accessories, classifieds, and more!

Full Forum Listing
Explore Our Forums

Recommended Communities

Join now to ask and comment!