If it takes 1.2 seconds for a projectile to reach its highest point, does it then take 2.4 seconds to return to the ground?
2006-12-04 11:15:33 · 5 answers · asked by chrislax352 2 in Science & Mathematics ➔ Physics
Ignoring air resistance - it will come back at the same speed it left because gravity is what is acting on it to slow it down to a stop for 1.2 seconds and gravity is what is going to pull it back at the same rate. So the total time is 2.4 seconds.
BTW
1.2^2 = 2xheight/32.2
max height is 23.184 feet.
2006-12-04 11:28:58 · answer #1 · answered by Anonymous · 0⤊ 1⤋
Not necessarily.
Once the projectile reaches its highest point ,it does'nt have any speed and falls at a constant acceleration (9.8 m/s square).
To find the time,you need the altitude,mass of the projectile and the coefficient of friction (air resistance).
2006-12-04 19:33:40 · answer #2 · answered by domedweller2 3 · 0⤊ 0⤋
Well, I disagree with the first answer - because it will not accelerate for it's whole climb - ie a bullet accelerates but starts to slow down even before it reaches it's maximum height.
The return to earth is due to gravity - yes it will accelerate but the forces are not the same.
Hopefully some professor will give us the correct equation!
2006-12-04 19:21:17 · answer #3 · answered by Anonymous · 0⤊ 0⤋
yes only if you talking about the full time period to travel to its highest point and return, then yes. and if again if speed is content, e.g 9.8 m/sec^2 gravity in the return part of motion and in reaching the highest point.
2006-12-04 19:27:29 · answer #4 · answered by year 12 student 2 · 0⤊ 0⤋
yes, because the acceleration is constant
2006-12-04 19:17:25 · answer #5 · answered by 7 · 0⤊ 0⤋