Physics - W.E.P. Question with Solution | TestHub

PhysicsW.E.P.Calculation of workEasy2 minPYQ_2020
PhysicsEasysingle choice

A vertical spring of force constant 100 Nm-1 is attached to the ceiling, with a block of mass 10 kg suspended from it. Now an external force F is applied on the block so that the spring is stretched by an additional length of 2 m. The work done by the force F is [Take g=10 ms-2]


Options:

Answer:
A
Solution:

x = elongation in spring due to mass 10 kg

= 1 0 × 1 0 1 0 0 = 1 m

W F = 1 2 × 1 0 0 × 3 2 - 1 2 - 1 0 × 1 0 × 2

=200 J

Stream:JEESubject:PhysicsTopic:W.E.P.Subtopic:Calculation of work
2mℹ️ Source: PYQ_2020

Doubts & Discussion

Loading discussions...