Calculating Acceleration from Tennis Serve Data

[trynagetby]

Homework Statement

The fastest served tennis ball, served by "Big Bill" Tilden in 1931, was measured at 73.14 m/s. The mass of a tennis ball is 57.0 g, and the ball is typically in contact with the tennis racquet for 30.0 {\rm ms}, with the ball starting from rest.

Homework Equations

F=ma
p=mv (?)
don't understand how to find the acceleration

The Attempt at a Solution

f=57(a)

found the momentum in an attempt to relate it to acceleration, but I failed. Any ideas on how to find the acceleration?

 

[PhanthomJay]

What's the definition of acceleration?

 

[SammyS]

Homework Statement

The fastest served tennis ball, served by "Big Bill" Tilden in 1931, was measured at 73.14 m/s. The mass of a tennis ball is 57.0 g, and the ball is typically in contact with the tennis racquet for 30.0 {\rm ms}, with the ball starting from rest.

Homework Equations

F=ma
p=mv (?)
don't understand how to find the acceleration

The Attempt at a Solution

f=57(a)

found the momentum in an attempt to relate it to acceleration, but I failed. Any ideas on how to find the acceleration?

Hello trynagetby. Welcome to PF.

The ball goes from zero to 73.14 m/s in 30 milliseconds. What's the average acceleration ?

 

[trynagetby]

so it should be this

a=(Vf-Vo)/t

30 milliseconds = .03 seconds

73.14/.03 seconds

= 24380 ?

57(24380) = 1389660 but my online homework is telling me that's wrong

 

[netgypsy]

put your units in your calculations and you'll see the problem.