Question

The range of a projectile when launched at angle Ois same as
when launched at angle 2 0 What is the value of e?​

Answer 1

Explanation:

Range of a projectile launched at an angle θ is given as R=

g

u

2

sin2θ

R(θ)=R(2θ)

⟹

g

u

2

sin2θ

=

g

u

2

sin4θ

⟹sin2θ=sin4θ=2sin2θcos2θ

⟹cos2θ=

2

1

⟹2θ=60

∘

⟹θ=30

∘