A car drives at a constant $15\mathrm{m}/\mathrm{s}$ along a curve on city street with a radius of $70\mathrm{m}$. What is the acceleration of the car?

• A. $3.2\mathrm{m}/{\mathrm{s}}^2$, away from the center of the circle
• B. $5.3\mathrm{m}/{\mathrm{s}}^2$, toward the center of the circle
• C. $5.3\mathrm{m}/{\mathrm{s}}^2$, away from the center of the circle
• D. $9.8\mathrm{m}/{\mathrm{s}}^2$, down
• E. The car is not accelerating because it is travelling at a constant speed.
• F. $3.2\mathrm{m}/{\mathrm{s}}^2$, toward the center of the circle