Question

A set of photographs has to be taken for a wedding. All the guests are to be sent digitally stored copies through the ordinary postal service. There are fifty photographs and each photograph is between 1.8 and 2.5 Mb in size.
Work out the maximum storage space required for a set of photographs. State, with reason, a suitable medium to use for the copies to be sent to the guests.

Answer 1

Answer:

Explanation:

Let the point be at a distance of x m from.the mass of 0.3 kg. Then moment of inertia of the system  

l=m  

1

​

r  

1

2

​

+m  

2

​

r  

2

2

​

 

l=0.3x  

2

+0.7(1.4−x)  

2

 

For minimum work moment of inertia of the system should be minimum hence, we have  

dx

dl

​

=0

Using  

dx

d

​

x  

n

=nx  

n−1

, we have

dx

dl

​

=0.3×2x−0.7×(1.4−x)=0

⇒x=0.98m