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Newton’s Laws of Motion — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysicsNewton’s Laws of Motion1 Mark
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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