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Vika [28.1K]
2 years ago
5

In which situation is a person doing scientific work on an object?

Physics
1 answer:
viktelen [127]2 years ago
7 0
When they’re in a science lab or in school
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A motorist enters a freeway at 45 km/h and accelerates uniformly to 99 km/h. From the odometer in the car, the motorist knows th
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Answer:

a)  19440 km/h²

b) 10 sec

Explanation:

v₀ = initial velocity of the car = 45 km/h

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Using the kinematics equation

v² = v₀² + 2 a d

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a = 19440 km/h²

b)

t = time required to reach the final velocity

Using the kinematics equation

v = v₀ + a t

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t = 0.00278 x 3600 sec

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An 1100kg car reached 30m/s in 9s from rest. What force did the engine provide?
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≅3666.67 N

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calculate a = (30-0)/9 ≅ 3.33 m/s2

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