Question

q wahaj has one and fourth part of
he ball are his hand and total
amount of ball, he has 400 it has
ball are
divided
fifly in him brother
remaining
?
the
into
what​

Answer 1

Answer:

Let u be the initial velocity of the ball while going upwards.

The final velocity of the ball at height x is, v=0

Using the relation; v  

2

=u  

2

+2as

we have,

0=u  

2

−2gx⟹u=  

2gx

​  

 

If t is the time taken by the ball in going up through distance x,

then 0=u+(−g)t⟹t=  

g

u

​  

 

​Total time after which the ball comes into the hand is :

T=2t=  

g

2u

​  

=2  

g

2x

​  

 

​  

 

During time T,  (n−1) balls will be in air and one ball will be in hand.

TIme of stay for each ball in hand , =  

n−1

T

​  

=  

n−1

2  

g

2x

​  

 

​  

 

​  

=  

(n−1)

2

g

2x

Hence, the correct option is (B)

Step-by-step explanation:

Answer 2

Answer:

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