Homework Help: Physics

Posted by Imalka on Friday, August 10, 2012 at 4:56am.

Upon a flat only 10 m high (Is that possible?) there are two guns A and B attached together making a vertical angle of 60 degrees when A is flat on roof. They fire at the same time and has the same reloading time. Both guns are capable of giving an initial velocity of 5√3 to their bullets. If the 2nd bullet of A hits the 1st bullet of B in mid air, what's the reload time?

Physics - bobpursley, Friday, August 10, 2012 at 9:41am
You have to figure where they hit. They ave the same horizontal distance, and same vertical final height at times separated by reload time.

Vertical poistion:
A) h=10-1/2 g (t-R)^2 where t is time in air of B, and R is reloadt time.
B) h=10-5sqrt3sin60*t
That t puts them at the same vertical height. So you have three unknowns, vertical height, t, and R. You have two equa;tions.
Now considerhorizontal distance.
A) d=5sqrt3*(t-R)
B) d=5sqrt3*cos60*t
set these two eqaul to get
t-R=cos60t or 1.5t=R
Now you have three equations, three unknowns.
Have fun with the algebra. It should work out quickly.

Answer this Question

Related Questions

trig - A bolt secured to a bridge is being acted upon by forces being exerted by...
Psycholofgy - Can someone help me with this please! Is this the correct answer I...
Statistics - You have a fair die. The die has a 2 on two sides, a 4 on two sides...
Physics - TWo blocks of massses 20 kg and 8 kg are connected together by a light...
Psycholofgy - Please help! I'm having a very hard time with this question. ...
Physics - "Two springs are hooked together and one end is attached to a ...
Music Theory - Trumpet- I need the notes and fingerings for Concert Scales: C, F...
physics - Two blocks of masses m and M [M = 4.23m] are placed on a horizontal, ...
Calculus - Two posts, one 12 feet high and the other 28 feet high, stand 30 feet...
Calculus - Two posts, one 12 feet high and the other 28 feet high, stand 30 feet...

For Further Reading

First Name:
School Subject:
Answer: