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Lilit [14]
3 years ago
12

Please help me with Q 7 c

Mathematics
2 answers:
frez [133]3 years ago
8 0

Answer:

11.25 km h^-2

Step-by-step explanation:

Acceleration = increase in velocity / time

= 90 - 0 / 8

= 11.25 km h^-2.

DIA [1.3K]3 years ago
4 0

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}
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