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Robertoalva
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1. A simple Atwood’s machine uses a massless pulley and two masses m1 and m2. Starting from rest, the speed of the two masses is 2.2 m/s at the end of 2.9 s. At that time, the kinetic energy of the system is 85 J and each mass has moved a distance of 3.19 m
(a) Find the value of heavier mass. The acceleration due to gravity is 9.81 m/s^2.
(b) Find the value of lighter mass.
KE=1/2mv^2
F=ma
well, it says that i have the kinetic energy so it would be something like this:
85J= 1/2m1(2.2m/s)^2 + 1/2m2(2.2m/s)^2
after this i get stuck, they are asking me to find the mass, and the only other equation that i think may fit would be F=ma but then, I don't know how
(a) Find the value of heavier mass. The acceleration due to gravity is 9.81 m/s^2.
(b) Find the value of lighter mass.
Homework Equations
KE=1/2mv^2
F=ma
The Attempt at a Solution
well, it says that i have the kinetic energy so it would be something like this:
85J= 1/2m1(2.2m/s)^2 + 1/2m2(2.2m/s)^2
after this i get stuck, they are asking me to find the mass, and the only other equation that i think may fit would be F=ma but then, I don't know how