Laws Of Motion Question 188

Question: A particle of mass 0.3 kg is subjected to a force $ F=-kx $ with $ k=15N/m. $ What will be its initial acceleration if it is released from a point 20 cm away from the origin [AIEEE 2005]

Options:

A) 5 m/s2

B) 10 m/s2

C) 3 m/s2

D) 15 m/s2

Show Answer

Answer:

Correct Answer: B

Solution:

Force on particle at 20 cm away $ F=kx $ F = 15 × 0.2 = 3 N $ [ \text{As }k=15\ N/m ] $

$ \therefore $ Acceleration = $ \frac{Force}{Mass}=\frac{3}{0.3}=10m/s^{2} $



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