Question

a body moving along a straight line at 20m/s undergoes an acceleration of -4 ms-2 after2 secs its speed will be

Answer 1

Answer:

12m/s²

Explanation:

a = v-u/t

-4 = v - 20 /2

-8 = v -20

+12 = v

Answer 2

GIVEN-    U=20 M/S, A=-4 M/S²,  T= 2 SEC ,  V=?

TO FIND =V

SOLUTION =     FROM THE EQUATION = V=U+AT,WE CAN FIND OUT V.

 V=20+(-4X2)

 V =20-8

 V=12M/S

HOPE AAPKO SAMAJ AAYA HOGA.