Register to reply

Force exerted over a distance

by kaiazad
Tags: distance, exerted, force
Share this thread:
kaiazad
#1
Oct21-09, 02:25 AM
P: 2
1. The problem statement, all variables and given/known data
The fastest pitched baseball was clocked at 46 m/s. If the pitcher exerted his force (assumed to be horizontal and constant) over a distance of 1.0 m, and a baseball has a mass of 145 g.
What force did the pitcher exert on the ball during this record-setting pitch?

2. Relevant equations
f=ma


3. The attempt at a solution
I know that newtons are (kg*m)/sec^2, but I only have a velocity, not an acceleration, so I can't figure out the right force.
Phys.Org News Partner Science news on Phys.org
Bees able to spot which flowers offer best rewards before landing
Classic Lewis Carroll character inspires new ecological model
When cooperation counts: Researchers find sperm benefit from grouping together in mice
mathfeel
#2
Oct21-09, 02:39 AM
P: 181
Quote Quote by kaiazad View Post
1. The problem statement, all variables and given/known data
The fastest pitched baseball was clocked at 46 m/s. If the pitcher exerted his force (assumed to be horizontal and constant) over a distance of 1.0 m, and a baseball has a mass of 145 g.
What force did the pitcher exert on the ball during this record-setting pitch?

2. Relevant equations
f=ma


3. The attempt at a solution
I know that newtons are (kg*m)/sec^2, but I only have a velocity, not an acceleration, so I can't figure out the right force.
Not to give away the answer: There is a formula that relates acceleration, initial velocity, final velocity, and distance traveled. Since you know three of the four items, with it you can find the acceleration, and hence the force.

Go find it in your textbook.
kaiazad
#3
Oct21-09, 02:54 AM
P: 2
Figured it out! thanks!


Register to reply

Related Discussions
Force exerted Introductory Physics Homework 1
How to get the distance from the Sun when the net gravitational force exerted by the Introductory Physics Homework 2
Force exerted. Please help Introductory Physics Homework 3
Force exerted Introductory Physics Homework 1
Force exerted Introductory Physics Homework 5