Question

A plane flies with a speed of 278 mps along a course which passes over an anti-aircraft gun on the ground. The airplane is at an altitude of 5390 m. If the muzzle velocity of the projectile is 735 mps with a slope of 4 vertical to 3 horizontal, determine the angle between the horizontal and the line of sight at which the projectile must be fired in order to hit the airplane during the upward motion of the projectile.

Answer 1

Is it meters per second or miles per second?

Answer 2

meters per second

Answer 3

I know you may not like this, but I'm going to say that the bullet never touches the aircraft. I may off on something, but I think I'm right.

Answer 4

is ur conclusion based on any solution or....?

Answer 5

I think I see where I'm wrong. It has to do with the bullet velocity. I'll redo.

Answer 6

ok

Answer 7

I need to know what this muzzle velocity of the projectile is 735 mps is?

Answer 8

the muzzle velocity is the velocity of the projectile of the bullet as it leaves the muzzle of the gun. it is 735 mps

Answer 9

Is it a horizontal component or vertical component or both or what. It tells me the slope but you can't use it directly because its probably a reduced form the slope. Slope is velocity and they say 4 up and 3 right, but you can't take those values literally. 8/6 is same as 4/3 so we don't know.

Answer 10

Is it 735 in the vertical or horizontal? That's what I need to know.

Answer 11

well, i think it is both the horizontal and vertical v.

Answer 12

and thats the problem.

Answer 13

but i think that we can get the horizontal and vertical v though the slope. use the slope to get the angle, then after u get the angle, use the 735 mps and the angle to get the vx and vy...im not sure with that

Answer 14

through*

Answer 15

i think i got it hang on

Answer 16

I looked at this question earlier. Honestly, it doesn't really make sense. They stipulate the angle and then they ask for the angle. Make sure you got the wording right, or, if there's a diagram that somehow explains this, post it.

Answer 17

well, i agree with u @Algebraic! because u can simply get the angle with the given slope. im also confused with that, but maybe the point is that we will use the angle to get the vx and vy, and then use the equations to get the theta

Answer 18

impossible.

Answer 19

changing the angle changes Vx and Vy.

Answer 20

yet they stipulate Vy/Vx ... doesn't make sense.

Answer 21

is this from an online problem set? or if it's from a text book, can you scan and post the pic. or take an ss?

Answer 22

it is from a book, but there's no picture. i posted exactly the same problem as it is in the book

Answer 23

Well, I've tried interpreting this problem statement in a way that somehow makes sense.. but nothing has come to me.

Answer 24

or maybe we won't be using the slope....haha, i just don't know

Answer 25

please help =(

Answer 26

how?

Answer 27

this is our homework to be submitted tomorrow....=(