Physics

A bullet is fired horizontally from the roof of a building 100 meters tall with a speed of 850 m/s. Neglecting air resistance, how far will the bullet drop in 3 seconds?

1 29.4 m
2 44.1 m
3 100 m
4 2550 m


Answer should be choice 2) 44.1m

BUT I DON'T GET IT!
Please help me;(

if i remember the formula correctly as:
x = (-9.8/2)t^2 + vt + x0
x = (-9.8/2)(3^2)
x = 44.1 m

You split up this problem into horizontal and vertical components like below:
a = acceleration
v = velocity
x = distance
x0 = starting distance (usually 0)
t = time
Vertical:
a = -9.8m/s^2
v = none (they said that the bullet was shot horizontally so vertically, it would be like the velocity at the peak of a free-fall.
x = 100 m
x0 = 0 m (this is like the starting point of the fall so technbically 0)
Horizontal:
a = none (gravity doesn't move sideways and there's no given acceleration)
v = 850m/s
x = (not given)
x0 = (not given)
:)

asked by Min

Respond to this Question

First Name

Your Response

Similar Questions

  1. PHYYYYYSICS 6

    Three marksmen stand at the top of a building. Two of them fire identical bullets out of identical rifles. The bullets leave the rifles with the same initial speed. The last marksman forgot his rifle, so he drops his bullet off
  2. physics

    From the top of a tall building, a gun is fired. The bullet leaves the gun at a speed of 340 m/s, parallel to the ground. As the drawing shows, the bullet puts a hole in a window of another building and hits the wall that faces
  3. Physics

    From the top of a tall building, a gun is fired. The bullet leaves the gun at a speed of 340 m/s, parallel to the ground. The bullet puts a hole in a window of another building and hits the wall that faces the window. (y = 0.42 m,
  4. physics

    From the top of a tall building, a gun is fired. The bullet leaves the gun at a speed of 340 m/s, parallel to the ground. The bullet puts a hole in a window of another building and hits the wall that faces the window. (y = 0.42 m,
  5. Physics

    A bullet is fired horizontally with a velocity of 40m/m from the top of a building 50m height.How far from the foot of the building will the bullet be assumed to touch the ground?
  6. Science

    From the top of a tall building, a gun is fired. The bullet leaves the gun at a speed of 340 m/s, parallel to the ground. As the drawing shows, the bullet puts a hole in a window of another building and hits the wall that faces
  7. Physics

    A hammer is thrown horizontally from the flat roof of a tall building at a velocity of 10m/s and hits the ground below after 5 seconds. (a) How high is the roof? (b) How far from the building does it land.
  8. physics

    From the top of a tall building, a gun is fired. The bullet leaves the gun at a speed of 340 m/s, parallel to the ground. As the drawing shows, the bullet puts a hole in a window of another building and hits the wall that faces
  9. Science

    From the top of a tall building, a gun is fired. The bullet leaves the gun at a speed of 340 m/s, parallel to the ground. As the drawing shows, the bullet puts a hole in a window of another building and hits the wall that faces
  10. Physics

    a projectile is fired horizontally outward from the top of a table. the initial height of the bullet above the ground is 1.5 meters and the bullet travels a horizontal distance of 3.0 meters before striking the ground. Calculate

More Similar Questions