Calculate the velocity of the particle at t=4.0 s.

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Homework Help Overview

The problem involves calculating the velocity of a particle subjected to a net force over a specified time interval. The subject area pertains to dynamics and motion along the x-axis.

Discussion Character

  • Exploratory, Assumption checking, Mathematical reasoning

Approaches and Questions Raised

  • The original poster expresses difficulty in applying the numbers correctly. Participants inquire about the methods attempted and question the reasoning behind specific elements of the formulas being used.

Discussion Status

The discussion is ongoing, with participants seeking clarification on the application of formulas and the reasoning behind certain values. There is an exploration of different interpretations of the problem setup.

Contextual Notes

Participants are discussing the implications of the mass value in the context of the force applied and its relation to acceleration. There is a focus on understanding the components of the equations involved.

student000
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A 2.0 kg particle is moving along the x-axis to the left with a velocity of v= -6.0 m/s. Suddenly, between times t =0 and t = 4.0 x a net force = 3t^2 – 12t is applied to the particle, where F is in N and t is in s. Calculate the velocity of the particle at t=4.0 s.
I am having trouble making the numbers work. Thanks
 
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Well, what have you tried so far?
 


Someone told me to use this formula but I don't understand why the 4 is in the first equation because the mass is 2 kg
 


Sorry, the formula is
a= force/mass= (3t^2-12t)/4

Why is there a 4?
 

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