i have a gun and i shoot it up perpendicular to gravity. at a particular time, velocity will be 0. then wen it comes back down, will it gain the velocity with which we shot the bullet?
plz justify answers..................
2007-03-09 01:27:37 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Physics
lets assume friction is = 0
2007-03-09 01:42:39 · update #1
no friction
2007-03-09 01:58:46 · update #2
No. In a vacuum, it would. However, the earth's atmosphere will create friction, slowing the bullet to sub-"launch" velocity.
2007-03-09 01:31:51 · answer #1 · answered by Anonymous · 0⤊ 1⤋
On the way up it has an initial velocity (i.e when it is shot from the gun at high velocity.) then gravity acts upon it to slow it down to zero.
On the way down the bullet is gradually accelerated by gravity - according to Newtonian maths if it was high enough, it could actually surpass its maximum velocity on the way up.
In the real world it will not due to air resistance (friction) and the bullet will eventually reach a point called 'terminal velocity' where the air resistance is equal to the acceleration of the bullet - hence it will then fall with constant velocity.
2007-03-09 10:17:48 · answer #2 · answered by Doctor Q 6 · 0⤊ 0⤋
No. It will lose velocity both going up and going down due to air resistance. Thus it will be traveling much slower on is return.
2007-03-09 09:57:00 · answer #3 · answered by NotEasilyFooled 5 · 0⤊ 0⤋
Did your teacher or text cover this? If your school works the way most schools do, they did.
2007-03-09 09:31:54 · answer #4 · answered by Mac the Nice 2 · 0⤊ 1⤋