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3.2 , motion in plane — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics3.2 , motion in plane1 Mark
MCQ
Two projectiles are thrown simultaneously in the same plane from the same point. If their velocities are $v_1$ and $v_2$ at angles $\theta _1$ and $\theta_2$ respectively from the horizontal, then answer the following question

The trajectory of particle $1$ with respect to particle $2$ will be

  • A
    a parabola
  • ✓
    a straight line
  • C
    a vertical straight line
  • D
    a horizontal straight line
✓

Answer

Correct option: B.
a straight line
b
$V_{12(x)}=v_{1} \cos \theta_{1}-v_{2} \cos \theta_{2}$

$a_{12(x)}=0 \Rightarrow V_{12(y)}-V_{1} \sin _{1}^{\theta}-V_{2} \sin ^{\theta}_{2}$

$\Rightarrow a_{12(y)}=0$

$x=v_{12(x)} t \ldots(1)$

$y=v_{12(y)} t \ldots(2)$

From $(1) \&(2) Y=\frac{V_{12}(y)}{V_{12(y)}}$

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