Q.

A projectile is launched at angle θ to the horizontal from point L and it hits the target on level ground. During the entire motion:Now match the given columns and select the correct option from the codes given below.

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a

i-p, ii-q, iii-r, iv-s

b

i-r, ii-s, iii-q, iv-p

c

i-s, ii-p, iii-q, iv-r

d

i-p, ii-r, iii-p, iv-s

answer is B.

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Detailed Solution

ar = g cos α, at = g sin α.α first decreases and then increases. So radial acceleration increases and then decreases, Tangential acceleration decreases and then increases.Power due to gravity = m→g.v→=mg(gt-usinθ)So power increases from initially negative to zero to finally positive. Total acceleration is g which always remains constant.
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