Solving Physics Homework: Frictional Force & Speed of Baseball Player

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Homework Help Overview

The discussion revolves around a physics problem involving a baseball player sliding into home base, focusing on the concepts of frictional force and initial speed. The problem includes calculations related to the coefficient of kinetic friction and the player's mass.

Discussion Character

  • Mixed

Approaches and Questions Raised

  • Participants explore the calculation of the frictional force using the coefficient of kinetic friction and the player's weight. There are attempts to draw a free body diagram and apply relevant equations. Questions arise regarding how to approach the second part of the problem, particularly in finding acceleration.

Discussion Status

The discussion is active, with participants sharing their attempts and seeking clarification on specific steps. Some have provided calculations, while others express uncertainty about how to proceed, particularly in determining the average force and acceleration.

Contextual Notes

Participants are working under the constraints of a homework assignment, which may limit the information they can use or the methods they can apply. There is an emphasis on drawing a free body diagram as part of the problem-solving process.

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Homework Statement



A baseball player of mass 80.0 kg slides into home base. The coefficient of kinetic friction between the player and the ground is 0.610.
a.) What is the magnitude of the frictional force? (In solving this part of the question draw a free body diagram with all of the forces labelled. Use a rectangle to represent the baseball player. Also, assume the player is moving to the right while sliding.)
b.) If the player comes to rest after 1.5 s, what must have been the initial speed of the player?

Homework Equations




The Attempt at a Solution

 
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can you show your work? where are you getting stuck?
 
i don't even know where to start... like what do i do?
 
Fn
|
<-- Ff (0.610)RECTANGLE(80.0kg)----> Fa(his sliding)
|
Fg

Fk=mue Fn
Fk=(0.610)mg
Fk=(0.610)(80)(9.81)
=478.725N

ahha i honestly made up that answer for part a... but the FBD is right (:
 
k i understand that equation but how do i find the average force to find the acceleration in part b?
 

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