'How long will it take a shell fired from a cliff at an initial velocity of 800m/s at an angle 30 deg below the horizontal to reach the ground 150m Read more: On level ground a shell is fired with an initial velocity of 80 m/s at 60 degrees above the horizontal and feels no appreciable air resistance? - Find the horizontal and vertical components of the shell`s velocity.

1

Answers

2016-01-28T13:50:00+08:00

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
 ito yung para sa second question mo
Horizontal component = (cos 30 degrees) x 80 = 69.28 m/s
Vertical component = (sin 30 degrees) x 80 = 40 m/s
 ito yung sa una.. sorry akala ko kasi nagkamali k type
two pla questions mo


H=H0+ V0(t)+ 1/2 G (t^2)

H0= 150m
V0= -800 sin 30 degrees = -400m/s
G= 9.8 m/s^2
t= time
substitute
H=150-400t- 4.9t^2
use quadratic eqtn
t= -400 +/- squareroot of (400^2+ 4*4.9*150)/-9.8
t= -400+/- squareroot of (160000+2940)/-9.8
t= 82.01 sec
t= 0.3733 sec
answer it will take 0.3733 sec for the shell to reach the ground

0