Question

please help urgent . i need the answer urgently​

Answer 1

Answer:

${5} m {s}^{ - 2}$

Answer 2

Answer:

Ans a) Velocity at the 4th second u=20m/s

Velocity at the 8th second v=40m/s

Acceleration a= v−u

t

= 40−20

4

=20 = 5m/s²

4

Distance travelled s=ut+1/2at²

=20×4+1/2×5×4²

=80+40

=120m