Question

the initial speed of an arrow shot (see image questions ) please help me answer this question

Answer 1

15m/sec.................

Answer 2

here's your answer mate:-

firstly we calculate the range of projectile..

R = vo² sin2@ / g

R = (20)² sin 2×30 / 10

R = 400 × 0.866 /10

R = 346.5 / 10

R = 35 m


Now we calculate velocity from this formula:-

R = vo² sin2@ / g

vo² = R × g / sin 2@

vo² = 35 × 10 / sin 60

vo² = 350 /0.866

vo² = 404

vo = √ 404

vo= 20 m/sec

here @ this for theta


hope it's helpful

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