Question

44th question pls asap

Answer 1

Range of Projectile = R = uSin/ ( 20) / g

Max. Range is at  ∅⇒45°

R = u/g ⇒ u = Rg ⇒ 400g

When a particle pushed up through a inclined plane,

a = -gSin∅

a = -gSin30° = -g/2

Now,by the Equation of Motion

v² - u² ⇒ 2as

- (400g)² = 2 X g/2 X 8

S = 400g

Answer 2

Hey mate here is your answer
HOPE IT IS HELPFUL