Question

a stone is dropped from height of 10m on an planet having g=20ms find speed and time
​

Answer 1

Answer:

velocity 20ms

time 1 sec

Answer 2

Solution:

Given:

⇒ Height (h) = 10 m

⇒ g = 20 m/s²

To Find:

⇒ Speed

⇒ Time

Formula used:

⇒ v² = u² + 2gh

⇒ v = u + gt

Now, from 3 Equation we will calculate speed.

⇒ v² = u² + 2gh

⇒ v² = 0 + 2 × 20 × 10

⇒ v² = 400

⇒ v = 20 m/s

Now, from 1 Equation we will calculate time.

⇒ v = u + gt

⇒ 20 = 0 + 20t

⇒ t = 20/20

⇒ t = 1 sec.

Hence,

⇒ Speed of stone = 20 m/s

⇒ Time taken by stone = 1 sec.