A 6.25 g quarter sits 25 cm from the axis of rotation on a turntable that has a period of rotation of 1.8 seconds. What must the coefficient of static friction be in order to keep the quarter from sliding outward when the
turntable is in motion?

Plzz worth 22 ! which statement about energy transformations is not true? a all forms of energy can be transformed into thermal b energy is never destroyed or created during transformations c potential chemical energy always transforms into kinetic d some thermal energy is always released during a transformation

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

What is the kinetic energy of a baseball moving at a speed of 40 m/s if the baseball has mass of 0.15 kg?