A spring 40 mm long is stretched by the application of a force. If 10 N force required to stretch the spring through 1 mm, then work done in stretching the spring through 40 mm is

(a) 84J

(b) 68J

(c) 23J

(d) 8J

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#6 | Solved Problems on Potential Energy

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Elastic potential energy

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#6 | Solved Problems on Potential Energy

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Elastic potential energy

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#6 | Solved Problems on Potential Energy

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Concept Questions :-

Elastic potential energy

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Which of the following graph depicts spring constant *k* versus length *l *of the spring correctly

(1) | |

(2) | |

(3) | |

(4) |

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Two springs have their force constant as *k*_{1} and ${k}_{2}({k}_{1}>{k}_{2})$. When they are stretched by the same force** **

(1) No work is done in case of both the springs

(2) Equal work is done in case of both the springs

(3) More work is done in case of second spring

(4) More work is done in case of first spring

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The potential energy of a certain spring when stretched through a distance ‘*S*’ is 10 *joule*. The amount of work (in joule) that must be done on this spring to stretch it through an additional distance ‘*S*’ will be:

(1) 30

(2) 40

(3) 10

(4) 20

PMT - 2002

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A spring of force constant 800 *N*/*m* has an extension of 5*cm. *The work done in extending it from 5*cm* to 15 *cm* is:

(1) 16 *J*

(2) 8 *J*

(3) 32 *J*

(4) 24 *J*

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#6 | Solved Problems on Potential Energy

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A spring of spring constant 5 × 10^{3} *N/m* is stretched initially by 5*cm* from the unstretched position. Then the work required to stretch it further by another 5 *cm* is

(1) 6.25 *N*-*m*

(2) 12.50 *N-m *

(3) 18.75 *N-m*

(4) 25.00 *N-m *

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#6 | Solved Problems on Potential Energy

#7 | Mechanical Energy

Concept Questions :-

Elastic potential energy

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