Question

A stone is projected from the ground with a velocity of 14m/s one second later it clears a wall 2m high . The angle of projection is (g=10m/s2).

a. 45°. b.30°. c.60°. d.15°

Answer 1

h= u²sin²∅ / 2g 
2= 196 Sin²∅ / 20 
Sin²∅ = 40 / 196 
Sin²∅ = 0.204 
Sin∅ = 0.451
∅= 26.85 ( if we put g= 10 m/s²

h= u²sin²∅ / 2g 
2 x 2 x9.8 =196 sin²∅
sin²∅= 39.2 / 196 
Sin²∅ = 0.2 
Sin∅= 0.44
∅ =26.56 

b) answer maybe the right one :)

Answer 2

Explanation:

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