Question

two seconds after projection,a projectile is moving at 30degrees above the horizontal,after one more second it is moving horizontally. the angle of projection is[g=10m/s2]

Answer 1

the graph (very poorly drawn) shows y as a function of x at given moments of time.

I used the following facts
1) v = u + at (first kinematics eq)
2)
$\tan( \alpha ) = vy \div vx$
where Vy is v sub y, vertical component of velocity at that instant and similarly Vx

3) horizontal component of velocity, u cos( theta ) remains constant.

for rest look the image, answer 60°

Answer 2

Answer:

ans is 60 degrees

hope it helps u