Mathematics
24.05.2023 03:31
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The braking distance, D, of a car is directly proportional to the square of its
The braking distance, D, of a car is directly proportional to the square of its speed, v. When d=5, v=10
Find d when v=70
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Tdhaynes7759
4,5(15 marks)
d = 245
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
klu65
4,7(80 marks)
B is the correct answer choice I know it
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