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alondraalfaro06
08.10.2019 •
Physics
Which scenario involves acceleration? a motorcycle at constant speed on a highway a recreational vehicle parked in a campground a car decreasing its speed due to a red light a teenager talking to friends at an intersection
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Ответ:
A car decreasing its speed due to a red light is accelerating since there is a change in speed.
Acceleration is the rate of change of speed with respect to time. Acceleration is given by:
Acceleration = change in speed / time
A motorcycle moving at constant speed is not accelerating since there is no change in speed.
A recreational vehicle parked in a campground s not accelerating since there is no change in speed.
A car decreasing its speed due to a red light is accelerating since there is a change in speed.
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Ответ:
a car decreasing its speed due to a red light
Explanation:
Acceleration of an object is defined as the rate of change in velocity of the object:
where
Therefore, we have a non-zero acceleration every time there is a change in velocity.
Among the examples given, we notice that only the following one:
"a car decreasing its speed due to a red light"
involves a change in velocity (because the car is decreasing its speed), therefore this scenario involves a non-zero acceleration.
Ответ: