A 17 kg car travels in a flat circle. At a certain instant, the velocity of the car is 18 m/s west and the total acceleration of the car is 2 m/s2 at 51 degrees north-west. What is its radius? Answer in units of km.

In a uniform circular motion, which of the following physical quantity remains constant everywhere on the circular path? Note: Be careful. Speed. Velocity. Position. Acceleration. Centripetal force.

a person swings a rock around on a string, causing it to sweep out in a circle of radius 1.8m. If the rock travels at a constant speed of 18.7 m/s, what acceleration does it experience?

A particle traveling in a circular path of radius 300 m has an instantaneous velocity of 30 m/s and its velocity is increasing at a constant rate of 4 m/s2. What is the magnitude of its total acceleration at this instant?

A red car has a speed of 17.6 m/s and is driving on a circular track with a radius of 111 m. A blue car has a speed of 10.3m/s and is driving on a circular track with a radius of 55 m. What is the ratio of the centripetal acceleration of the red car to that of the blue car? ared/ablue =

Answer all.parts