# Evil PHysics!!!!!!

posted by .

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

## Similar Questions

1. ### Statistics

Data collected on volcanic eruptions give a mean time between eruptions of 29 months. Assume these eruptions occur as a Poisson process in time, find the: (a) Expected number of eruptions during the five-year period beginning from …
2. ### Math-Probability

Data collected on volcanic eruptions give a mean time between eruptions of 29 months. Assume these eruptions occur as a Poisson process in time, find the: (a) Expected number of eruptions during the five-year period beginning from …
3. ### Statistics-Probability

Data collected on volcanic eruptions give a mean time between eruptions of 29 months. Assume these eruptions occur as a Poisson process in time, find the: (a) Expected number of eruptions during the five-year period beginning from …
4. ### Statistics-Probability

Data collected on volcanic eruptions give a mean time between eruptions of 29 months. Assume these eruptions occur as a Poisson process in time, find the: (a) Expected number of eruptions during the five-year period beginning from …

a graphic source is an image that help you understand what you read. common graphic source include charts, graphs,and diagrams. study the following graphic source. then answer the questions below. the worst volcanic eruptions in history …
6. ### Last science question

2. A tall volcano, sometimes as high as 10,000 feet, composed of lava, ash, and other volcanic material and that can have explosive eruptions is best known as a__________. cindercone volcano composite volcano shield volcano all of …
7. ### science

A tall volcano, sometimes as high as 10,000 feet, composed of lava, ash, and other volcanic material and that can have explosive eruptions is best known as a ___________________.?
8. ### Physics

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 35degrees to the horizontal, from the …
9. ### Physics

During volcanic eruptions, chunks of solid rock can be blasted out of the volcano; these projectiles are called volcanic bombs. The Figure shows a cross section of Mt. Fuji, in Japan. (a) At what initial speed would a bomb have to …
10. ### science

i just some science questions but there not for school. 1. five volcanic eruptions and what are the locations of these eruptions. Did they occur in the middle of a plate or near a plate boundary?

More Similar Questions