part b) should be 2.76rad/s^2 according to the answer at the back of the book Could you please double check your answer to "A car with tires of radius 33 cm has a speed of 90 km/h (assume two significant digits). (a) What is the angular velocity of the wheels in radians per second? (b) The speed 5.0 s later is 45 km/h. What is the angular acceleration (assumed constant) of the wheels? that you answered me this morning?

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Centripetal Force

A particle, body, object or certain mass while travelling in a rotational path or semicircular path, experiences an inertia force. If that inertia force pulls the towards the inward of the imaginary circle in the rotation, it is termed as centripetal force.