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Edexcel a2 physics question!

Hi can anyone explain parts d-g for me?

Thank you very much :smile:

ImageUploadedByStudent Room1426973809.171095.jpg


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**but especially part f - what does it mean???!?

Am I supposed to find centripetal acceleration?
(edited 9 years ago)
Original post by ThatWasHard!
Hi can anyone explain parts d-g for me?

Thank you very much :smile:

ImageUploadedByStudent Room1426973809.171095.jpg


Posted from TSR Mobile

**but especially part f - what does it mean???!?

Am I supposed to find centripetal acceleration?
Speed is a scalar quantity defined as (distance travelled/time taken). i.e. the particle travelling a circumferential distance and time.

Velocity is a vector quantity with both magnitude and direction. i.e. displacement from it's original position to a new position.

Think in terms of diameter or chord length as the displacement together with direction travelled in a straight line between the two positions. The time taken will be the duration to move the circumferential distance between the two points.
Okay, but the velocity would have the same magnitude around the circle, it only changes because the direction is changing. So why isn't the velocity change from one point to another the centripetal acceleration?


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Got it thanks.

Velocity is a vector so it's just v2-v1.

By change of velocity they were asking for the literal change, not the acceleration (you don't divide by time) - (the tangential acceleration rather than centripetal. Is that correct?)

But then how does the direction change?
(edited 9 years ago)

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