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Lilit [14]
2 years ago
12

Please help me with Q 7 c

Mathematics
2 answers:
frez [133]2 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]2 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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Answer:

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The position function is

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0=-4.9t^2+3.5t+5 and factor that however you are currently factoring in class to get that

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We all know that time will never be a negative value, so the time it takes this ball to hit the ground is

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3 years ago
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STatiana [176]

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