Question

Rohit, a student of class XI performs the experiment of helical spring at home. He fixed one end of a light spring of spring constant k to the wall and tied the other end to a block placed on a smooth horizontal surface. He knew that in a displacement, the work done by the spring is ½ kx2. He notes the following observations to justify the equation.
(i) the spring was initially compressed by a distance x and was finally in its natural length.
(ii) the spring was initially in its natural length and finally in compressed position.
(iii) the spring was initially stretched by a distance x and was finally in its natural length.
(iv) the spring was initially in its natural length and finally in a stretched position.
The correct observation(s) are:
a. (i) only.
b. (i) and (iii) only.
c. (ii) and (iv) only.
d. (ii) only.

Answer 1

Answer:

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Explanation:

(i) and (iii)only