Question

TELL THE ANSWER FASTIY WITH CORRECT EXPLANATION​

Answer 1

answer:-28.8

Explanation:

w.k.t. distance=height

distance= vel.× time

we solve this in 3 cases.

1. time is 2sec. and velocity is non uniform hence , velocity=(initial vel.- final vel),. velocity= ( 0-3.6) = -3.6m/s. distance= -3.6×2= -7.2-----------eq1.
2. here velocity is uniform but time is (10 -2)=8sec. hence dis= 3.6 ×8 = 28.8----eq2.
3. and again vel= 3.6-0 = 3.6 and time is 12-10=2sec. hence dis= 3.6×2 = 7.2----eq3
4. hence add eq 1,2 and 3 we get. height= - 7.2+28.8+7.2 = 28.8