Average net force acting on the performer if his mass is 65kg?

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Discussion Overview

The discussion revolves around calculating the average net force acting on a performer, specifically a human cannonball, given a mass of 65 kg and a time of 1.5 seconds to exit a 1.6-meter long cannon. The focus is on applying relevant physics equations to solve the problem, with participants exploring various approaches and clarifying concepts related to motion and force.

Discussion Character

  • Homework-related
  • Mathematical reasoning
  • Technical explanation

Main Points Raised

  • One participant expresses confusion over how to apply the equations of motion, mentioning attempts with acceleration and distance formulas.
  • Another participant suggests using the equation x = (1/2)at² + v₀t + x₀ and emphasizes the relationship F = ma.
  • A participant seeks clarification on the meaning of v₀ (initial velocity) and the presence of x on both sides of the equation.
  • Further clarification is provided regarding the definitions of v₀, x₀ (initial position), and x (final position).
  • A participant indicates that they eventually understood the equation d = (1/2)at² but expresses concern about their test performance.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the best approach to solve the problem, as there are varying levels of understanding and confusion regarding the equations involved.

Contextual Notes

There are limitations in the discussion, including missing assumptions about initial conditions and the need for clarity on the definitions of variables used in the equations.

Who May Find This Useful

This discussion may be useful for students studying kinematics and dynamics, particularly those preparing for tests involving force calculations and motion equations.

ital_dj
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[SOLVED] I really need help

I understand the very simple questions and all, but when the book throws all these extra things at me, I get so lost. You might've remembered my earlier post (my first one), so I'm back with a bit more.

Code: 
If it takes a human cannonball 1.5s to exit a 1.6m long cannon, what is the average net force acting on the performer if his mass is 65kg?

I tried using a a=[tex]\frac{v_{2}-v_{1}}{t}[/tex] equation, but that wouldn't work. I also tried the d = v t equation, but that wouldn't work either. I'm assuming I still use Fnet = ma for this.

For you answers could you also tell me why that works? Thanks a lot

EDIT: Additionally, I just read the sticky, and if a mod feels that it should belong in the homework section, please feel free to move it; but it's not really homework, as I'm just studying for a test.
 
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[tex] x=\frac{1}{2}a t^2 + v_0 t + x_0[/tex]

and F=ma
 
I'm still having trouble putting the formula together. I filled in the t's with the 1.5, but I've never heard of v_0... I've heard of v_1 though. Additionally, how is there an x on both sides of the equation?
 
v_0 is the initial velocity, which is...

x_0 is the initial position, which is...

x is the final position, which is...
 
Ok, I finally got it. You're equation helped a little, but I was still confused by it. The final equation was d = 1/2at^2

Thanks a lot for the effort... I really don't think I'm going to do well on this test :cry:
 

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