Question

Please help me with Q 7 c

Answer 1

`v_(i) = 0 \: (from \: rest) \\ v_(f) = 90 \: km \: per \: hr \\ t_(i) = 0 \\ t_(f) = 8 \: hr \\ a = ((v_(f) - v_(i)))/((t_(f) - t_(i))) \\ a = (90)/(8) \\ a = (45)/(4) km/ {hr}^(2)`

Answer 2

11.25 km h^-2

Explanation:

Acceleration = increase in velocity / time

= 90 - 0 / 8

= 11.25 km h^-2.