What is the angle of projectile ?

A projectile is thrown with speed 40 ms^(-1) at angle theta from horizontal . It is found that projectile is at same height at 1s and 3s. What is the angle of projection ?

A projectile is thrown with speed 40 ms^(-1) at angle theta from horizontal . It is found that projectile is at same height at 1s and 3s. What is the angle of projection ?

A body is projected such that its kinetic energy at the top of its trajectory is frac(3)(4) of its initial kinetic energy. What is the angle of projection of the projectile?

The range of a projectile, when launched at an angle of 15^(@) with the horizontal is 1.5 km. what is the range of the projectile, when launched at an angle of 45^(@) to the horizontal with the same speed ?

The range of a projectile, when launched at an angle of 15^(@) with the horizontal is 1.5 km. what is the range of the projectile, when launched at an angle of 45^(@) to the horizontal with the same speed ?

The range of a projectile, when launched at an angle of 15^@ with the horizontalis 1.5 km. What is the range of the projectile, when launched at an angle of 45^@ with the horizontal?

Show that the horizontal range of a projectile is same for two angles of projection . Is the sum of maximum heights for these two angles dependent on the angle of projectile ?

What are the angles of projection of a projectile projected with velocity 30 ms^(-1) , so that the horizontal range is 45 m ? Take g = 10 ms^(-2) .