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Newton’s Laws of Motion — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsNewton’s Laws of Motion5 Marks
Question
A particle is observed from two frames S1 and. S2. The frame S2 moves with respect to S1 with an acceleration a. Let F1 and F2 be the pseudo forces on the particle when seen from S1 and S2 respectively. Which of the following are not possible?
  1. F1 = 0, F2 ≠ 0
  2. F1 ≠ 0, F2 = 0
  3. F1 ≠ 0, F2 ≠ 0
  4. F1 = 0, F2 = 0
✓

Answer

  1. F1 = 0, F2 = 0

Explanation:

$\text{a}_{\text{s}_1\text{s}_2}=\text{a} \ ...(1) $

Acceleration of the particle w.r.t. to $\text{S}_1=\frac{\text{F}_1}{\text{m}}$

Acceleration of the particle w.r.t. to $\text{S}_2=\frac{\text{F}_2}{\text{m}}$

If we assume F1 = 0 and F2 = 0,

we can conclude that $\text{a}_{\text{s}_2\text{s}_1}=0 \ ...(2)$

From equations (1) and (2), we can say that our assumption is wrong.

And F1 = 0, F2 = 0 is not possible.

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