Questions
The path of one projectile as seen by an observer on another projectile is a/an :
a
straight line
b
parabola
c
ellipse
d
circle
detailed solution
Correct option is A
We know that;x=(ucosθ)t and y=(usinθ)t−12gt2 Let x2−x1=u1cosθ1−u2cosθ2t=xy2−y1=u1sinθ1t−12gt2−u2sinθ2t+12gt2=u1sinθ1−u2sinθ2t=Y∴YX=u1sinθ1−u2sinθ2tu1cosθ1−u2cosθ2t=u1sinθ1−u2sinθ2u1cosθ1−u2cosθ2= constant, m (say) ∴Y=mXIt is the equation of straight line passing through the origin.Talk to our academic expert!
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A ball is thrown with a velocity of u making an angle with the horizontal. Its velocity vector normal to initial vector (u) after a time interval of
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