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Gurinder Bagha

· started a discussion

· 1 Months ago

Incorrect answer (Question:299790.0)

Potential energy is directly propotional to sqaure of extension so ans has to be 400 joules

Question:

When a spring is stretched by 2 cm it stores 100 J of energy. If it is stretched further by 2 cm, the stored energy will be increased by:

Options:
A)

100 J

B)

200 J

C)

300 J

D)

400 J

Solution:

Ans: (c) 300 J

Gurinder Bagha

· commented

· 1 Months ago

@Jyoti Grewal
Ok. Thank you.

Jyoti Grewal

· commented

· 1 Months ago

Answer is 300 J. Increase in energy(400J-100J) have been asked.
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