Why does the tension act upward in a pulley when the mass of the object is greater
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Tenision is nothing but a force,but this force acts in a string. when the pulley is added with an object with greater mass, the force actually acts upwards as theass is downwards.Its because the string is applied with a force,which actually tries to pull the object upwards.
hope this helps.
hope this helps.
alfredmelwin25p5fmxx:
the mass*..sorry for the typo
No probs
Answered by
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Imagine a massless and frictionless pulley with two weights hanging either side of the pulley by a massless string.
Like this except not attached to a ceiling
Rather than being fixed to a ceiling, the pulley is being pulled upward by an external force F, with the weights and string still attached.
Due to Newton's 2nd Law,
ΣFy=F−2T=maΣFy=F−2T=ma,
where TT is the tension in the string on either side of the pulley and aa is the vertical acceleration of the pulley.
Clearly, since there is a net upward force, the pulley itself will accelerate upwards.
But because the m=0m=0,
F−2T=0F−2T=0.
Like this except not attached to a ceiling
Rather than being fixed to a ceiling, the pulley is being pulled upward by an external force F, with the weights and string still attached.
Due to Newton's 2nd Law,
ΣFy=F−2T=maΣFy=F−2T=ma,
where TT is the tension in the string on either side of the pulley and aa is the vertical acceleration of the pulley.
Clearly, since there is a net upward force, the pulley itself will accelerate upwards.
But because the m=0m=0,
F−2T=0F−2T=0.
thank you
No probs
ok
@tharareddy37,which class do u study?
11th
but why
hello alfred
I just wanted to ask
ok
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