The path of one projectile as seen by an observer on another projectile is $$a/an$$:

Question

Infinity Learn · Accepted Answer

We know that x $$=$$ $$(u$$ $$cos$$ θ$$)t$$  and y $$=$$ $$(u$$ $$sin$$ θ$$)t-12gt2Let$$ $$x2-x1$$ $$=$$ $$(u1$$ $$cos$$θ$$1-u2$$ $$cos$$θ$$2)t$$ $$=$$ X      $$y2$$ $$-$$ $$y1$$ $$=$$ $$(u1$$ $$sin$$θ$$)t$$ $$-$$ $$12gt2-(u2$$ $$sin$$ θ$$2)t+12gt2$$                   $$=$$ $$(u1$$ $$sin$$θ$$1-u2$$ $$sin$$θ$$2)t$$ $$=$$ YY X $$=$$ $$(u1sin$$θ$$1-u2sin$$θ$$2)t(u1cos$$θ$$1-u2cos$$θ$$2)t$$        $$=$$ $$u1sin$$θ$$1-u2sin$$θ$$2u1cos$$θ$$1-u2cos$$θ$$2$$        $$=$$  constant, m $$(say)Y$$ $$=$$ mXIt is the equation of a straight line passing through the origin.

The path of one projectile as seen by an observer on another projectile is a/an:

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