Question

A ball is thrown upward with velocity 20 m/s, take 8 sec to come to the ground. (2 M) (a) Calculate Maximum Height reached the ball. (b) Calculate the total displacement (c) Calculate total distance covered in motion (d) Define free fall​

Answer 1

Answer:

a . 20.4 m b. 0. c . 40.8 m d . falling of an object under the influence of Earth's gravitational pull alone is called free fall.

Explanation:

a. due to gravitational force acceleration changes into gravition means

a=g and

s changes to h means distance to height

v*2 =u*2 + 2gh

v will becomes 0

then 0= 20*2 +2×-9.8 × h

-400 = -19.6×h

cancelling both side substation signs

400 = 19.6 × h

400/19.6 = h

h = 20.4 m

b . it becomes zero becomes it initial and final are same

c. Distance = h+h

= 20.4 + 20.4

= 40.8 m