A block is attached to a ceiling by a spring of force constant. When pulled down and released, the block undergoes simple harmonic motion. The motion of the block is shown in the time plot.

Which of the choices most closely describes the amplitudeand frequency of the motion of theblock?

=2cm;=16

=4cm;=116

=4cm;=18

=2cm;=116

Which of the equations of motion best describes the motion of theblock?

()=2cos(8)

()=2cos(8)

()=4cos(16)

()=4cos(8)

If the mass of the block is2.14kg, what is the force constantof thespring?

=__________N/m