Question

perpendicular to r
(3) Acceleration and velocity both are parallel to 7
(4) Acceleration is perpendicular to ř and velocity
is directed towards the origin
18. A projectile is thrown from ground with speed
20 m/s at angle O with horizontal. It is found that
projectile is at same height at 0.5 s and 1.5 s. The
angle of projection is
(1) 30°
(2) 60°
(3) 37°
(4)45
​

Answer 1

Answer:

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