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Q.

A stone is thrown upwards as shown in the diagram. When it reaches point P, which of the following has the greatest value for the stone?


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a

Its acceleration

b

Its kinetic energy

c

Its potential energy

d

Its weight 

answer is C.

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Detailed Solution

When it reaches the point P, its potential energy has the greatest value for the stone.
As we know, potential energy is defined as the product of the mass m of the object, acceleration due to gravity g and height h travelled by the body.
The mathematical expression for potential energy is,
 P.E.=mgh
Where m,g, and h represents the mass, gravitational acceleration and height respectively.
From the figure, at point P, the stone is at its highest point with zero velocity. Thus, when the stone reaches the point P, potential energy has the greatest value.
 
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A stone is thrown upwards as shown in the diagram. When it reaches point P, which of the following has the greatest value for the stone?