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Laws of Motion question bank (Physics)

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Q1.

A spring of force constant $15 \mathrm{~N} / \mathrm{m}$ is cut into two pieces. If the ratio of their length is $1: 3$, then the force constant of smaller piece is $\_\_\_\_$ $\mathrm{N} / \mathrm{m}$.

(A)
60
(B)
15
(C)
20
(D)
45
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Q2.

An object with mass 500 g moves along x -axis with speed $v=4 \sqrt{x} \mathrm{~m} / \mathrm{s}$. The force acting on the object is :

(A)
8 N
(B)
5 N
(C)
6 N
(D)
4 N
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