Homework Help: Evil PHysics!!!!!!

Posted by krystal on Saturday, September 30, 2006 at 11:44am.

Hello,

I am having trouble with this problem:

During volcanic eruptions, chunks of solid rock can be blasted out of the volcano; these projectiles are called volcanic bombs.

a)At what initial speed would a bomb have to be ejected, at angle (sigma0=35 degrees) horizontal, from vent A in order to fall at the foot of the Volcano At B, at vertical distance h=3.30 km and horizontal distance d=9.40km? Ignore for the moment, the effects of air on the bomb's travel.

b) What would be the time of flight?
c)Would the effect of the air increase or decrease your answer in a?

Calculate the time of flight due to vertical velocity. Let vy be vertical velocity.

hfinal=hinitial+vy*time -1/2 g time^2
hfinal=0
hinitial=3300m
vy=Vsin35

Second equation:
Vcos35*time=9400m
V= 9400/(cos35*time)

Put that expression for V into the first equation, and solve for time. Note it is a second degree equation, so use the quadratic equation.

Thank you

No one has answered this question yet.

Answer this Question

Related Questions

Last science question - 2. A tall volcano, sometimes as high as 10,000 feet, ...
3 grade english - a graphic source is an image that help you understand what you...
Statistics - Data collected on volcanic eruptions give a mean time between ...
Statistics-Probability - Data collected on volcanic eruptions give a mean time ...
Statistics-Probability - Data collected on volcanic eruptions give a mean time ...
Math-Probability - Data collected on volcanic eruptions give a mean time between...
science - A tall volcano, sometimes as high as 10,000 feet, composed of lava, ...
English - In which sentence is the underlined word a past participle? Melted ...
geology (urgent) - i am having trouble finding how a shield volcano erupts and ...
calculus - I am working on this problem and having some trouble. We're ...

For Further Reading

First Name:
School Subject:
Answer: