Question

The spring balance used for measuring mass of a wooden block has 20 divisions between 0-10 g mark on its scale. When the block is hanged on the balance, the pointer reaches 14th mark below 80g mark. Find the mass of the block.​

Answer 1

Answer:

According to the question,

The maximum mass scale can read M=50kg

The maximum displcement of spring =

length of scale, l=20cm=0.2m

T (time period) =0.6s

Maximum force exerted on the spring F=mg

So,

g=acceleration due to gravity =9.8m/s

2

F=50×9.8=490

Since, speing constant,

k= lF

= 0.2490

=2450Nm −1

m is suspended from the balance

T=2π km

Since,

m=( 2πT2 ×k

=( 2×3.140.6 ) 2 ×2450

≈22kg

Explanation:

hope it helps you