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whether we can solve fbd without using constrained motion? why do we have to define the direction and magnitude of acceleration of objects(in a system)..why cant we just rely on newtons laws of motion

whether we can solve fbd without using constrained motion? why do we have to define the direction and magnitude of acceleration of objects(in a system)..why cant we just rely on newtons laws of motion
 

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1 Answers

Sumit Majumdar IIT Delhi
askIITians Faculty 137 Points
7 years ago
Dear student,
When there are multiple bodies combined together, then just the FBD on a particular body would help and the constraints have to be taken into consideration.
The newton’s laws are valid in an Inertial reference frame whereas when a body is accelerated and therefore you have to define the magnitude and direction of the accelerations of the objects.
Regards
Sumit

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