You place a penny on a turntable at a distance of 14.3 cm from the center. the coefficient of static friction between the penny and the turntable is 0.400. the turntable's angular acceleration is 2.45 rad/s². how long after you turn on the turntable will the penny begin to slide off of the turntable? [note: assume the tangential component of friction is sufficiently small and can be ignored.]

Time will be 2.13 sec

Explanation:

We have given that distance r = 14.3 cm =

Coefficient of static friction

Angular acceleration is given by

We know that frictional force is given by

And centrifugal force is given by

When coin just starts moving

We know that , here is angular velocity

According to first equation of motion we know that

As

so

wind moving at higher speeds will transfer more energy to the water, resulting in stronger waves.