Question

7
An experiment is carried out to measure the extension of a rubber band for different loads.
The results are shown below.
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Answer 1

Explanation:

The answer is b. 17.3. Hope it helps you ❤

Answer 2

so the length is 17.3 cm for third case

given

various loads , lengths and extension from the table:

F1=0N , L1=15.2cm , Δx=0

F2=1N , L2=16.2cm , Δx=1cm

F3=2N , Δx=2.1cm

F4=3N , L4=18.6 cm , Δx=3.4cm

to find

L3

solution

• in the above annotations following are the meanings

• F= load put on the rubber band in N

• L= length of the rubber band in cm

• Δx= extension in the rubber band due to loads in cm which can be calculated by subtracting final length and initial length

• NOTE: final length is that length which is obtained after extension while initial length is the original length

• first case

Δx=0

final length =initial length

• second case

Δx=1 cm

Δx=L2-L1=16.2-15.2=1cm

• third case

Δx=2.1cm

Δx=L3-L2=L3-15.2

2.1=L3-15.2

L3=17.3 cm

so the length is 17.3 cm for third case

#SPJ3