an object is traveling in a circular motion at constant speed. If the speed is doubled, the centripetal acceleration is changed by the factor of ?

If you touch a hot light bulb and get burned, that is an example of a. radiation b. convection c. conduction

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.15 times a second. a tack is stuck in the tire at a distance of 0.373 m from the rotation axis. noting that for every rotation the tack travels one circumference (a) find the tack's tangential speed. (b) what is the tacks radial acceleration?