Question

If a ball is thrown vertically upwards with a speed of 19.6 m/s from the top of the tower returns to the earth in 6 sec. Find the height of a tower?

Answer 1

Answer: 19.6 m.

Explanation: formula of velocity in vertical motion under the influence of gravity is;

v = √2gh

therefore v= √2.9.8.h

                 19.6 = √19.6.h

                  (squaring on both sides)

                 384.16 = 19.6.h

                  19.6 = h

Answer 2

Answer:

58.8

Explanation:

Given that,

Initial velocity u=19.6m/s

Final velocity v=0

Time t=6sec

The acceleration is

We know that,

 v=u+at

0=19.6+a×6

a=−3.27m/s  (approx)

2

Now, the height is

From the equation of motion

 s=ut+  1/2at^2

s=19.6×6−  1/2(3.27)(6*6)

s=58.9

there you go this is the correct answer mark brainliest if you want the other answer is wrong believe me