Question

33. A weight of 450 g produces an extension of 3.5 cm in a elastic string, find
(a) how much weight is required to produce an extension 1.75 cm.
(b) how much extension will be produced by 9 kg weight.​

Answer 1

Step-by-step explanation:

Let x cm be the extension produced by the weight of 700 gm.

Weight ( in gm ) 250 700

Length ( in cm ) 3.5 x

Since, the amount of extension in an elastic spring varies and the weight hung on it is in direct variation, we get :

⇒

700

250

=

x

3.5

⇒ x×250=3.5×700

⇒ x=

250

3.5×700

⇒ x=

250

2450

⇒ x=9.8

∴ The required extension will be 9.8 cm.

Answer 2

Answer:

A weight of 450 gram produces an extension of 3.5 cm in elastic string, find

(a). How much weight is required to produce an extension 1.75 CM.

(b). How much extension will be produced by 9 kg weight.