Question

A projectile is projected with a speed 30m/s at an angle 30 with the vertical the speed of the projectile when its direction of motion makes an angle 30 with horizontal is

Answer 1

projectile makes an angle 30° with vertical it means , it also makes 60° angle with horizontal.

Let speed of projectile at that position where it makes 30° angle with horizontal.

we know, horizontal component of projectile doesn't change.

so, initial horizontal component of projectile = final horizontal component of projectile

or, ucos60° = vcos30°

or, 30cos60° = vcos30° [ given, u = 30m/s ]

or, 30 × 1/2 = v × √3/2

or, v = 10√3 m/s

hence, answer is 10√3 m/s

Answer 2

Answer:

A projectile is projected with a speed 30m/s at an angle 30 with the vertical the speed of the projectile when its direction of motion makes an angle 30 with horizontal is