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Crank
3 years ago
7

A vehicle moves in a straight line with an acceleration of 4 km/h2. By how much does the speed change each second? Answer in uni

ts of km/h.
Physics
1 answer:
Elena-2011 [213]3 years ago
3 0

Answer:

The speed of the vehicle changes in each second is, v = 0.00111 Km/h

Explanation:

Given,

The acceleration of the vehicle, a = 4 Km/h²

Converting it into m/s,

                                                    a = 0.0003086 m/s²

In each second the vehicle covers 0.0003086 m

The speed of the vehicle in each second is given by 0.0003086 m/s

Converting it into Km/h

                                     v = 0.00111 Km/h

Therefore, the speed of the vehicle changes in each second is, v = 0.00111 Km/h

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The answer is C 8.87*10^4 m/s (it shouldn't be m/s^2 though as velocity is in m/s)

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When you plug in the values you get

v = 2.39*10^4 + 5400*12 . so v = 8.87*10^4 m/s. C is your answer.
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a. E=1440KJ

b. E=360KJ

c. E=1.8 J

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