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Atwood machine 
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#1
Nov808, 04:02 PM

P: 84

1. The problem statement, all variables and given/known data
In the Atwood machine shown below, m1 = 2.00 kg and m2 = 7.50 kg. The masses of the pulley and string are negligible by comparison. The pulley turns without friction and the string does not stretch. The lighter object is released with a sharp push that sets it into motion at vi = 2.80 m/s downward. (a) How far will m1 descend below its initial level? (b) Find the velocity of m1 after 1.80 s. 2. Relevant equations f= ma vf^2 = v^2 + 2ad 3. The attempt at a solution i think for part a u use the equation i put above..but i dont know how to figure out acceleration...but i think its splitted between the two objects 


#2
Nov908, 05:24 AM

HW Helper
P: 2,249

Hi physics_geek,
To find the acceleration, start by drawing force diagrams for each of the objects. Using [itex]\sum F = m a[/itex] for each of the diagrams then gives two equations with two unknowns. (You can also use an energy appoach here.) 


#3
Oct1911, 06:33 PM

P: 1

Use the formula a= (gm1 + gm2)/(m2+m1) to find the acceleration then use the formula V^2=2ad to find the distance. Bada bing bada boom!
Im still workin on the second part unfortunately... 


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