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rebeccathecatt
27.11.2019 •
Physics
A0.31 kg cart on a horizontal frictionless track is attached to a string. the string passes over a disk-shaped pulley of mass 0.08 kg and radius 0.012 m and moves without slipping. the string is pulled vertically downward with a constant force of 1.1 n. find (a) the tension in the string between the pulley and the cart.
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Ответ:
To solve this problem it is necessary to apply the concepts related to Newton's second law and its derived expressions for angular and linear movements.
Our values are given by,
If we carry out summation of Torques on the pulley we will have to,
Where,
I = Inertia moment
The moment of inertia for this object is given as
Replacing this equations we have know that
Or
Replacing our values we have that
Therefore the tension in the string between the pulley and the cart is 0.974 N
Ответ: