Question

How long will fall the body from a height of 20 meters?

Answer 1

We can use the kinematics equation to solve this:
\[x = x_0 + vt + \frac{1}{2}at^2\]

where,

x = the final point the body reaches
x0 = the initial point of the body

v = initial velocity of the object
t = time
a = acceleration in this case it is the acceleration of gravity which is 9.8m/s^2

Answer 2

so first off draw a diagram

Answer 3

I decided this task) Thank you!

Answer 4

so you already solved it?

Answer 5

or do you still need help?

Answer 6

i solved it now) My answer: 2sec. Is it right?

Answer 7

yeah sounds right

Answer 8

ok. Thanks

Answer 9

https://www.wolframalpha.com/input/?i=0+%3D+20+-+%281%2F2%29%289.8%29x^2&dataset=