A race-car drives around a circular track of radius RRR. The race-car speeds around its first lap at linear speed v_iv i v, start subscript, i, end subscript. Later, its speed increases to 4v_i4v i 4, v, start subscript, i, end subscript. How does the magnitude of the car's centripetal acceleration change after the linear speed increases

Answer and Explanation: Centripetal Acceleration is the change in velocity caused by a circular motion. It is calculated as:

v is linear speed

r is radius of the curve the object in traveling along

For its first lap:

After a while:

Comparing accelerations:

With linear speed 4 times faster, centripetal acceleration is 16 times greater.

a cold ice-tea.

pour in room temperature or cold water. cover the pitcher and refrigerate. steep white or green tea for 6 to 8 hours; steep black or oolong tea for 8 to 12 hours.jun 28, 2015