A 40.1 g object is attached to a horizontal spring with a spring constant of 11.9 N/m and released from rest with an amplitude of 24.7 cm. What is the velocity of the object when it is halfway to the equilibrium position if the surface is frictionless?

v = 3.684 m/s

Explanation: The angular frequency (ω) of a loaded spring is given as

ω = √k/m

Where ω = angular frequency, k =spring constant = 11.9 N/m, m = mass of object = 40.1 g = 0.0401 kg.

The velocity of a simple harmonic motion is defied as

v = ω√A² - x²

Where A = Amplitude = 24.7cm = 0.247m and x = displacement.

For our question, we where asked to find velocity at half way, at half way, x = A/2

Hence at half way, x = 0.247/2 = 0.1235 m.

We need to get the value of angular frequency first.

ω = √(11.9/0.0401)

ω = √296.758

ω = 17.22 rad/s.

Then the velocity is

v = 17.22 √0.247² - 0.1235²

v = 17.22 √0.061009 - 0.01525225

v = 17.22 √0.04575675

v = 17.22 × 0.2139

v = 3.684 m/s

which piece of furniture will have the most inertia and give the furniture movers the most difficulty in moving?  

answer

a 75kg dining table