Question

How long will it take a ball to hit the ground if it's dropped from a height of 2.0 m?

Answer 1

0.63 s

Step-by-step explanation:

We have,

• Height, h = 2.0 m
• Initial velocity, u = 0 m/s
• Acceleration due to gravity, g = 10 m/s²

We have to find the time taken.

⠀⠀⠀⠀⇒ h = ut + ½gt²

⠀⠀⠀⠀⇒ h = ½gt²

⠀⠀⠀⠀⇒ 2 = ½ × 10 × t²

⠀⠀⠀⠀⇒ 2 = 5 × t²

⠀⠀⠀⠀⇒ 2/5 = t²

⠀⠀⠀⠀⇒ √(2/5) = t

⠀⠀⠀⠀⇒ 0.63 s = t

Therefore, time taken is 0.63 seconds.