Atray is moved horizontally back and forth in simple harmonic motion at a frequency of f = 2.20 hz. on this tray is an empty cup. obtain the coefficient of static friction between the tray and the cup, given that the cup begins slipping when the amplitude of the motion is 5.50 10-2 m.

Coefficient of friction will be 0.9738

Explanation:

We have given frequency of the motion f = 2.20 Hz

So angular frequency

Amplitude of the motion

Maximum acceleration is given by

Acceleration due to gravity

We know that acceleration is given by

So coefficient of friction will be 0.9738

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.