Physics · JEE

The potential energy of a spring, conservation of mechanical energy, conservative and non-conservative forces Previous Year Questions for JEE

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Part of Work, Energy and Power in JEE Main Physics.

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Q1PhysicsUnit 4: Work, Energy and Power

A wire suspended vertically from one of its ends is stretched by attaching a weight of

200 \mathrm{N}

to the lower end. The weight stretches the wire by 1 mm. Then the energy stored in the wire is

Q2PhysicsUnit 4: Work, Energy and Power

The potential energy of a system increases if work is done:

Q3PhysicsUnit 4: Work, Energy and Power

A spring with spring constants K when compressed by

1 \mathrm{cm}

, the potential energy stored is U.If it is further compressed by

3 \mathrm{cm},

then its final potential energy is

Q4PhysicsUnit 4: Work, Energy and Power

Two springs of force constants

\mathbf{1 0 0 0} N / \boldsymbol{m}

and

\mathbf{2 0 0 0} \boldsymbol{N} / \boldsymbol{m}

are stretched by same force. The ratio of their respective potential energies is

Q5PhysicsUnit 4: Work, Energy and Power

Assertion Graph between potential energy of a spring versus the extension or compression of the spring is a straight line Reason Potential energy of a stretched or compressed spring is proportional to square of extension or compression

Q6PhysicsUnit 4: Work, Energy and Power

Which quantity of a two particles system depend only on the separation between the two particles?

Q7PhysicsUnit 4: Work, Energy and Power

A spring is kept compressed by a toy car of mass

150 g .

On releasing the car it moves with a speed of

0.2 m s^{-1} .

So, the elastic potential energy of the spring is

Q8PhysicsUnit 4: Work, Energy and Power

A car of mass

1000 \mathrm{kg}

moving with a speed

18 k m h^{-1}

on a smooth road and colliding with a horizontally mounted spring of spring constnat

6.25 \times

10^{3} N m^{-1} .

The maximum compression of the spring is

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Our bank includes exam-style MCQs aligned with JEE Main Physics syllabus for The potential energy of a spring, conservation of mechanical energy, conservative and non-conservative forces, covering the same topics as previous year papers.

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