Motion Eqaution and Newtons Law Problem?

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Homework Help Overview

The problem involves the motion of a projectile described by specific equations for vertical and horizontal displacement. Participants are exploring whether these equations are applicable to an object launched on Earth and are attempting to determine the force acting on the object based on its mass.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the validity of the motion equations in the context of Earth's gravitational acceleration. Questions arise about how to derive velocity and acceleration from the given displacement equations. There is also an exploration of the relationship between force, mass, and acceleration.

Discussion Status

The discussion is active, with participants providing insights into the relationships between displacement, velocity, and acceleration. Some guidance has been offered regarding the use of derivatives to find acceleration, but there is no explicit consensus on the approach to solving part b of the problem.

Contextual Notes

Participants are working under the assumption that the projectile's motion may not align with typical conditions on Earth due to the acceleration not being equal to 9.8 m/s². There is also a mention of the mass of the object, which is relevant for calculating force.

r_swayze
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A projectile has been launched and moves according to the equations: y = 6.00 + 3.45t − 7.20t2 m, and x = 17.0t m. (a) Do these equations describe an object launched on Earth? (b) Assume the object is a slide rule of mass 0.207 kg. What force is being exerted on it?

I know part a is no, since the acceleration isn't 9.8, but I have no idea how to do part b? any help?
 
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F=ma

Do you understand what each of the terms in your equation of motion mean? Remember that s=s_{i}+v_{i}t+\frac{1}{2}at^{2}

:DDDDDDDD
 
Last edited:
r_swayze said:
I know part a is no, since the acceleration isn't 9.8, but I have no idea how to do part b? any help?


So if y is displacement, how does one find velocity and hence acceleration?

Now use the message below.

206PiruBlood said:
F=ma
 
ok, I see just take the 2nd derivative of y and x and multiply by mass

thanks guys
 

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