Question

A ball start moving with an acceleration of 4m/ s square .find out its speed after 4 second.

Answer 1

as we know v=u+at
u=0(because it starts to move)
a=4
t=4
v=0+4*4
=0+16
=16m/s
speed and velocity are almost same
hope it was helpful

Answer 2

initial velocity u = 0 m/s
acceleration a= 4 m/s²
time t= 4 seconds
final velocity v = ?
  a=(v-u)/t
 4m/s² =(v-0)/4
4m/s² X 4 =v
16 m/s=v(final velocity)

so the final speed (velocity) of the ball after 4 seconds will be 16m/s

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