Average force between baseball and bat

[Rachelbot12]

Homework Statement

[/B]
A 0.145- kg baseball with an initial speed of 20 m/s rebounds with a speed of 36 m/s after being struck with a bat. If the duration of contact between ball and bat was 2.4 ms, what was the magnitude of the average force between ball and bat?

Homework Equations

Δ velocity=Vf-Vi
F= mass* Δ velocity/(Δ time)

The Attempt at a Solution

[/B]
Δ velocity = -36-20 = -56 m/s

mass* Δ velocity/(Δ time) = 56 m/s * 0.145 kg / .0024s
3383.333 N

 

[BvU]

Hello Rachel, and welcome to PF :)

Seven digits precision is a bit much. Your calculation is just fine. Was that what you wanted to know ?
(In fact PF isn't really meant for stamp-approving homework -- I hope I don't get in trouble over this one...)

 

[Rachelbot12]

Hello Rachel, and welcome to PF :)

Seven digits precision is a bit much. Your calculation is just fine. Was that what you wanted to know ?
(In fact PF isn't really meant for stamp-approving homework -- I hope I don't get in trouble over this one...)

The problem is that it's an online homework and the website is saying it's incorrect. Thank you though!

 

[Rachelbot12]

Hello Rachel, and welcome to PF :)

Seven digits precision is a bit much. Your calculation is just fine. Was that what you wanted to know ?
(In fact PF isn't really meant for stamp-approving homework -- I hope I don't get in trouble over this one...)

Actually, I decided to try it without any decimal points and it turned out to be right. Weird. Thanks again :)

 

[HalfLostAndSearching]

I would first verify the given information and equations to ensure their accuracy and relevance to the problem. Once confirmed, I would approach the problem by calculating the change in velocity (Δv) using the given initial and final velocities. From there, I would use the formula for average force (F) to calculate the magnitude of force between the baseball and bat, taking into account the mass of the baseball and the duration of contact between the two objects. Based on my calculations, the magnitude of the average force between the baseball and bat is 3383.333 N. This value represents the average force applied by the bat to the baseball during the 2.4 ms duration of contact. It is important to note that this value may not accurately represent the maximum force experienced by the baseball, as it does not take into account any external forces or factors that may have influenced the rebound of the baseball.