Question

please help me with Q 7 c

Answer 1

Answer:

11.25 km h^-2

Step-by-step explanation:

Acceleration = increase in velocity / time

= 90 - 0 / 8

= 11.25 km h^-2.

Answer 2

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