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# S18 PH 121 7 practice 2

Newton's Laws
by

## Richard Datwyler

on 23 October 2018

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#### Transcript of S18 PH 121 7 practice 2

Finishing off Mechanics and Newtons Laws
"Why can't Newton's third law work with two forces acting on the same body?"
"I'm not understanding how there can be a "constraint" on acceleration when there is still an acceleration."
"Can we please review the bank robber question?"
if the angle theta 1 is 27 degrees what is the other angle?

what is the tension T2
46
55 N
What is the tension, and accelerations of each block?
What is the tension

What is the acceleration
What are the tensions
what is the acceleration
if there is a kinetic friction coefficient of .28
What must the coefficient of static friction be to hold this system in place?
What must m be so it doesn't slide?

what is the acceleration if bumped.
1.80 kg
1.26 m/s^2
What is the acceleration
and
tension
2.352 m/s^2
22.344 N
12.152 N

1
"Can you explain mechanical advantage?
"Could you please go over coefficients of friction? The idea, especially in equations, still seems a little foreign to me."
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