Question

Solve question 2 and 3

Answer 1

Explanation:

the answer of 1 is D that is velocity will be perpendicular to the direction of acceleration when projectile attains maximum height.

answer of 3 is

${t}^{2} = {r}^{3}$

Answer 2

Answer:

1..a{When the projectile reaches a vertical velocity of zero}

2..b {GMr = 4π²r²T²

T² = 4π2r3)GM

⇒ T² ∝ r³}