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Iam not understanding what force is really, pressure, thrust. If force comes to play when there is interaction between one object with another then it is only contact force has to be acted then how non contact for act. When we roll tje ball on the table top and now push against the motion of the table what will happen and how please answer all question in 3 hrs please and answer in lucid and easy manner

Iam not understanding what force is really, pressure, thrust.
 
If force comes to play when there is interaction between one object with another then it is only contact force has to be acted then how non contact for act.
 
When we roll tje ball on the table top and  now push against the motion of the table what will happen and how
 
please answer all question in 3 hrs please and answer in lucid and easy manner
 

Grade:8

1 Answers

Apoorva Arora IIT Roorkee
askIITians Faculty 181 Points
5 years ago
In physics, aforceis any interaction that, when unopposed, will change the motion of an object. In other words, aforcecan cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate.
Pressureis theforceapplied perpendicular to the surface of an object per unitareaover which that force is distributed.
Thrustis a reaction force described quantitatively by Newton's second and third laws. When a system expels or accelerates mass in one direction, the accelerated mass will cause a force of equal magnitude but opposite direction on that system.

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