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Atwood Machine

The document discusses Newton's 2nd Law, focusing on the relationship between force, mass, and acceleration. It includes calculations for mass, net force, acceleration, and tension for various scenarios, along with free-body diagrams. Additionally, it highlights the determination of friction and compares calculated versus theoretical acceleration with a percentage error.

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19 views3 pages

Atwood Machine

The document discusses Newton's 2nd Law, focusing on the relationship between force, mass, and acceleration. It includes calculations for mass, net force, acceleration, and tension for various scenarios, along with free-body diagrams. Additionally, it highlights the determination of friction and compares calculated versus theoretical acceleration with a percentage error.

Uploaded by

ggvp5wwcz9
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Newton’s 2nd Law

Purpose: To examine the relationship between force mass and acceleration.

Vocabulary Equations
Net Force a=Fnet/m
Vector W=mg
Weight 1kg=1000g
Mass
acceleration

What is the mass of the system to the right?


1 kg
What is the net force on the cart?
4N
What is the acceleration of the cart?
4 m/s^2

Draw a free-body diagram and label all the


forces on the cart.

Which of those forces are parallel to the


direction of motion? (Fnet)
Ft1 and Ft2
What is the net force on the cart in the diagram
above?

1N

How many objects will be moving? Circle them (m)


3

What is the mass of the “system” (all moving things)?


0.57 kg

What is the acceleration of the system? a=ΣF/m


0.1 m/s^2
Draw a free-body diagram for the 0.1 kg mass

What is the net force on the 0.1 kg mass


0.33 N

What is T1?
1.33 N

The Lab
Part 1: Determine the Force of Friction.

Acceleration Net Force Wight 1 Weight 2 Friction


a=2Δx/t2 F=ma

0.01 m/s^2 0.55*0.01= 2N 1N 0


0.0055

Tension 1: Fn= 0.01*250 = 2.5 Ft=


2.5-1=1.5

Tension 2: Fn= 0.01*250=2.5 Ft=


2+2.5=4.5

Calculated Acceleration Theoretical acceleration Percentage Error


a=2Δx/t2 a = Fnet / m

0.01 m/s^2 3.33 m/s^2 99.7% ???i think it’s wrong


What is the acceleration of the cart to the right?
6.15m/s^2

What are the Tension forces?


T1= 0.77 N
T2= 3.85 N

What is the tension in the rope?

a= 50/15= 3.333 m/s^2


T1= 3.33(5) +50 = 66.65 N

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