Pitch Speed Revalive to Bat Speed

  • Thread starter Thread starter CardsFan
  • Start date Start date
  • Tags Tags
    Pitch Speed
AI Thread Summary
To calculate the velocity of a fastball thrown at 95 mph when a bat with a speed of 86.99 mph makes contact, the conservation of momentum can be applied. The relevant equations include F=ma and the momentum equation, which considers the mass and velocity of both the ball and bat. The collision time is noted as 0.005 seconds, but the complexity of spin on the ball can complicate the results. A suggested resource provides a clearer explanation of these concepts and how to rearrange the formulas for calculations. Estimating the ball's velocity requires assuming a clean collision to simplify the analysis.
CardsFan
Messages
2
Reaction score
0

Homework Statement



It's for a physics project, in which I'm trying to calculate the velocity applied to a fastball thrown at 95mph, when the bat speed of a hitter is 86.99mph. The weight of the ball is 5oz, the weight of the bat 31oz, and we'll go with contact on the ball at .005s.(This is only the small part, the rest I can do alone)

Homework Equations



If I have the right ones... F=ma
Fxdelta t = mVf - mVi
(mass1 times velocity1 + mass2 times V2)i = (mass1V1 + m2V2)f


The Attempt at a Solution



Just not sure where to begin.

The only helpful site has been this http://www.kettering.edu/~drussell/bats-new/batw8.html
but i don't think i understand the guys explanations.


Thanks in advance for the help.
 
Last edited by a moderator:
Physics news on Phys.org
Anyone? Please...
 
It is difficult to solve this precisely because the ball can take spin off the bat and that drastically alters its speed and path. But if you assume a clean collision then using conservation of momentum, your 3rd formula, it is possible to estimate of the balls velocity. I thought the site you quote does it rather well. Just rearrange the formula so V1 is on the left and plug in some numbers.
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

How Is Impulse Calculated in Baseball Physics?
Replies
5
Views
2K
How Does a Cricket Bat Affect the Force on a Ball?
Replies
6
Views
4K
Bat Force and Human Lifting Capacity in Softball Pitching
Replies
21
Views
3K
How Do You Solve Basic Impulse-Momentum Physics Problems?
Replies
5
Views
5K
A question about velocity and collision btw. tennis ball and bat
Replies
3
Views
9K
Was the Porsche Speeding Before the Collision?
Replies
12
Views
3K
Softball Bat Speed vs Bat Weight
Replies
1
Views
4K
The Mystery: Bat Speed vs. Weight in Slowpitch Softball
Replies
23
Views
12K
Solving 2D Motion Revision Homework on Pitching Speed
Replies
3
Views
2K
Inelastic Collision from different but not opposite directions. HELP
Replies
2
Views
5K

Hot Threads

Recent Insights

Back
Top