Question

An object moving along a straight line at 12m/s and undergoes an accelaraton of 9m/s^2. After 4 seconds its speed will be

Answer 1

Answer:

After 4 seconds its speed will be 48 m/s

Explanation:

As it is moving along a straight line,

Velocity=Speed

u=Intial speed=12m/s

a=acceleraton=9m/s²

t=time=4 se

v = u+at

∴ v=12+(9*4)

    = 12+36

     =48 m/s

After 4 seconds its speed will be 48 m/s