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Motion in Straight Line

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Physics Part I

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Physics

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

A conveyor belt is moving at a constant speed of 2 m/s. A box is gently dropped on it. The coefficient of friction between them is μ = 0.5. The distance that the box - will move relative to belt before coming to rest on it taking 
g= 10 ms-2 is

  • 1.2 m

  • 0.6 m

  • zero

  • 0.4 m


D.

0.4 m


Force, 

F = μg

Retardation of the block on the belt

straight a space equals space straight F over straight m space equals space fraction numerator straight mu space mg over denominator straight m end fraction space equals space μg

From comma space straight v squared space equals space straight u squared space plus 2 space as
0 space equals space left parenthesis 2 right parenthesis squared space minus space 2 space left parenthesis μg right parenthesis straight s

straight s space equals space fraction numerator 4 over denominator 2 space straight x space 0.5 space straight x space 10 end fraction space equals space 0.4 space straight m

Force, 

F = μg

Retardation of the block on the belt

straight a space equals space straight F over straight m space equals space fraction numerator straight mu space mg over denominator straight m end fraction space equals space μg

From comma space straight v squared space equals space straight u squared space plus 2 space as
0 space equals space left parenthesis 2 right parenthesis squared space minus space 2 space left parenthesis μg right parenthesis straight s

straight s space equals space fraction numerator 4 over denominator 2 space straight x space 0.5 space straight x space 10 end fraction space equals space 0.4 space straight m
855 Views

What is the most essential thing to study the motion of a body?

The most essential thing to study the motion is reference frame. Rest and motion are relative terms. It means that an object in one situation can be in rest but in another situation, the same object will be in motion. 
650 Views

Is absolute rest or absolute motion possible?

Absolute rest and absolute motion is not possible because there is no point in the universe which is at rest and can be taken as point of reference. The planet Earth is in continuous motion. 
1986 Views

What is rest?

When an object does not change its position with time, with respect to it's surroundings. In such a case the object is said to be at rest. 
1215 Views

Can a body be always at rest in some frame?

Yes, a body is always at rest in a frame which is fixed with the body itself. 
746 Views

What is motion?

When an object changes it's position with time, with respect to it's surroundings, the object is said to be in motion. 
657 Views