RE:Newton's Laws of Motion Block Problem

AI Thread Summary
The discussion centers on a physics problem involving two blocks, M (30 kg) and m (20 kg), on frictionless surfaces with a force F of 180 N applied. Participants are trying to determine the accelerations of both blocks and the force exerted on block M by the pulley due to tension. There is confusion regarding the direction and magnitude of the tension force, with considerations of whether it acts horizontally, vertically, or at a 45° angle. The inquiry also touches on how the tension in the string could affect the acceleration of block M, particularly if the string's acceleration is significantly higher. The conversation seeks clarification on these dynamics and the resulting forces involved.
rajumahtora
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Homework Statement


In the arrangement shown, all surfaces are frictionless, mass of block M = 30 kg and m = 20 kg.
If F = 180 N , Find accelerations of both the blocks

attachment.php?attachmentid=65514&stc=1&d=1389452404.jpg
2. Doubt

How much force will be applied on the larger block M by the pulley(coz of tension)?
1. T towards right
2. T towards up
3. T√2 45° to the right
4. Any other answer3.Reason for doubt

If the total for exerted on the T i(cap) + T j(cap) i.e. Fnet on Bock M due to tension of string on pulley is T√2,
then there will be a force which will tend to pull block M upward...and if the accln of string is much higher, then the tension in the string will cause the block to accelerate up.

[To Jilang and tiny-tim,
After reading ur answer, i had this doubt too...so i asked again]

If anything else, please answer...
Thanks
 

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