Question #6c16b

1 Answer
Jan 6, 2018

vxy=243ms

Bomb will horizontally travel 183.5 m

Explanation:

Data
vx=15ms

vy=(2gh)12=(2(9.8)(3000))12=242.5ms

Calculating bomb speed and bottom-angle θ using above speeds (vectors):

vxy=((15)2+(242.5)2)12 = 242.95 m/s

θ=tan1(242.9515)=86.5o

Calculating bomb location "x" using angle θ and altitude "y":

x=3000tan(86.5)

x=183.5 meters

Double-checking if bomb will be in the "air" or in the "ground"
Using horizontal-speed

x=(vx)t=(15ms)20s=300 meters which is longer than 183.5 meters.

So, bomb will be at ground after 20 seconds at distance of 183.5 meters.
Bomb dropped only in:

t=xvx=183.515=12.3 seconds