Acceleration: is this accelerating?

AI Thread Summary
Acceleration occurs whenever there is a change in velocity, which includes changes in speed or direction. In the discussion, a motorcycle rounding a curve and a bus starting to move after a stoplight are both examples of acceleration. A car speeding up while driving east also demonstrates acceleration due to an increase in speed. Conversely, a helicopter ascending at a constant speed, a person jogging straight at a constant speed, and a car driving at a constant speed over a hill do not experience acceleration. Overall, the key takeaway is that any change in velocity, whether in speed or direction, indicates acceleration.
emma402
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Which of the following objects is accelerating:

1. A motorcycle rounds a curve without changing speed.
2. A helicopter ascending straight upward without speeding up for slowing down.
3. A person jogging straight south at a constant speed.
4. A bus starts moving after waiting for a stoplight, traveling in a straight line.
5. A car speeds up while driving east along a level road.
6. A car drives at a constant 45mph as it goes over the top of a hill

What I think as solutions...(correct me please if I'm wrong)

1. yes 4.yes
2. no 5.yes
3. no 6.yes
 
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For this all you need to know - as I'm sure you do - is that any change in velocity means there is acceleration.

So yes, each of your answers are correct, in short.
 
those are great questions.
 

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