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# As you drive down the road at 18 m/s , you press on the gas pedal and speed up with a uniform acceleration of 1.22 m/s2 for 0.70 s .?

Part A

If the tires on your car have a radius of 33 cm, what is their angular displacement during this period of acceleration?

Express your answer using two significant figures.

### 1 Answer

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- oubaasLv 78 months agoFavorite Answer
angular speed ω = V/r = 18/(1/3) = 54 rad/sec

angular acceleration α = at/r = 1.22/(1/3) = 3.66 rad/sec^2

angle Θ = ω*t+ α/2*t^2 = 54*0.7+1.83*0.7^2 = 38.70 radians ... rounded up to 39

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