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Mrrafil [7]
3 years ago
6

The braking distance, D, of a car is directly proportional to the square of its speed, v. When d=5, v=10

Mathematics
1 answer:
Ivenika [448]3 years ago
5 0

Answer:

<h2>          d = 245</h2>

Step-by-step explanation:

d is directly proportional to the square of a speed v

d = av²

5 = a•10²

5 = 100a

a = 0.05

d = 0.05v²

d = 0.05•70²

d = 0.05•4900

d = 245

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