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Acceleration in Two Dimensions

  • Thread starter Violagirl
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  • #1
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Homework Statement



A car initially traveling due north goes around a semicircle having a radius of 500 m at a constant speed of 20 m/s. A) How long does this take? B) What is the magnitiude and direction of the average acceleration?

Homework Equations



a = Δvx/Δt(xhat)+Δvy/Δt(yhat)


The Attempt at a Solution



I'm stumped as to how to start this problem. I drew out a half circle with the radius showing 500 m for the distance. I'm not sure if I'm missing a formula or what as I didn't see anything relevant for circles on my formula sheet from my class. Any help is appreciated.
 

Answers and Replies

  • #2
Dick
Science Advisor
Homework Helper
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Homework Statement



A car initially traveling due north goes around a semicircle having a radius of 500 m at a constant speed of 20 m/s. A) How long does this take? B) What is the magnitiude and direction of the average acceleration?

Homework Equations



a = Δvx/Δt(xhat)+Δvy/Δt(yhat)


The Attempt at a Solution



I'm stumped as to how to start this problem. I drew out a half circle with the radius showing 500 m for the distance. I'm not sure if I'm missing a formula or what as I didn't see anything relevant for circles on my formula sheet from my class. Any help is appreciated.
For one thing for motion in two dimensions, acceleration is a vector quantity. It has x and y components. You don't add them. But you didn't do part A yet. What's the Δt?
 

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