Question

an object is does a free fall motion . It hits the ground after 4 sec. calculate the velocity of the object after 3 sec and before it hits the ground . what can be the height it is thrown​

Answer 1

ANSWER:

29.4 M/S²

Explanation:

USING THE FORMULA V=U + AT

TAKING A AS GRAVITY = 9.8

U = INITIAL VELOCITY

V= FINAL VELOCITY

T = TIME TAKEN

SO, AS IT IS A FREEFALL U=0

SO,

V = 0+9.8*3

THEREFORE V = 29.4 M/S²

Answer 2

ANSWER: 29.4 M/S²

Explanation:

USING THE FORMULA V=U + AT

TAKING A AS GRAVITY = 9.8

U= INITIAL VELOCITY

V= FINAL VELOCITY

T= TIME TAKEN

SO, AS IT IS A FREEFALL U=O

SO, V = 0+9.8*3

THEREFORE V = 29.4 M/S2