Question

how do you fine the accleration and displacement of a pitch that has a initial velocity of 0 and an final velocity of 90 mph

Answer 1

You'll also need to know the time of travel.

Answer 2

how do i find the time of travel

Answer 3

That would have to be given. Do you have any other information?

Answer 4

no its a project so i have to come up with everything on my own i know weight of the ball is 145 grams and acceleration is 40.2 m/s and the initial velocity is 0 and final velocity is 90 mph and i need to find displacement and time of travel

Answer 5

So the answer to my question is actually, "yes." You do have other information.

If you know the acceleration and the change in velocity, you can find time interval from that.

Displacement can be found using either \(\large \Delta s = v_0t+0.5at^2\) or \(\large \Delta v^2=2a \Delta s\)

Answer 6

OK, go ahead. Let me know what you get.

Answer 7

i got 101

Answer 8

that dosent make any sense

Answer 9

101 what? What units and what did you try solving for?

Answer 10

Hmm, I might be thinking about this the wrong way. If this is a pitched ball, the acceleration happens before the ball leaves the hand. The time interval is only the time of the throw and doesn't include the ball's travel after being thrown.
The final velocity is as it is leaving the hand.

One thing you'll want to do is convert 90mph into m/s to keep your units consistent.

Answer 11

40.2 m/s

Answer 12

that means that the acceleration is different

Answer 13

Yeah, the 40.23 is the final velocity. If you're solving for acceleration and displacement and only know the change in velocity, then you might need to solve a system of two equations with two unknowns. If time is also an unknown, I don't think there is a third equation to use, but I'll check.