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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
A projectile is thrown into space so as to have a maximum possible horizontal range of $400$ metres. Taking the point of projection as the origin, the co-ordinates of the point where the velocity of the projectile is minimum are
  • A
    $(400,100)$
  • ✓
    $(200,100)$
  • C
    $(400,200)$
  • D
    $(200,200)$
✓

Answer

Correct option: B.
$(200,100)$
b
(b)

$R _{\max }=400 \,m$

The velocity is minimum at the highest point

$\Rightarrow H \rightarrow \frac{R}{2}$

$R=4 H$

$400=4 \times H$

$H=100 \,m$

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