A car moves in a circle of radius 5 m at 10 m/s. What is the centripetal acceleration?

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Multiple Choice

A car moves in a circle of radius 5 m at 10 m/s. What is the centripetal acceleration?

Explanation:
Centripetal acceleration is the inward acceleration that keeps an object moving in a circle, and its magnitude is found from a_c = v^2 / r. Here the car's speed is 10 m/s and the circle's radius is 5 m, so a_c = (10)^2 / 5 = 100 / 5 = 20 m/s^2. The acceleration points toward the center of the circular path. The other values would require different speed or radius, but with the given numbers, 20 m/s^2 is the correct magnitude.

Centripetal acceleration is the inward acceleration that keeps an object moving in a circle, and its magnitude is found from a_c = v^2 / r. Here the car's speed is 10 m/s and the circle's radius is 5 m, so a_c = (10)^2 / 5 = 100 / 5 = 20 m/s^2. The acceleration points toward the center of the circular path. The other values would require different speed or radius, but with the given numbers, 20 m/s^2 is the correct magnitude.

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