Author Question: A 0.025-kg block on a horizontal frictionless surface is attached to an ideal massless spring whose ... (Read 127 times)

Diane · **on:** Jul 29, 2018

A 0.025-kg block on a horizontal frictionless surface is attached to an ideal massless spring whose spring constant is 150 N/m. The block is pulled from its equilibrium position at x = 0.00 m to a displacement x = +0.080 m and is released from rest.

The block then executes simple harmonic motion along the horizontal x-axis. When the displacement is x = 0.024 m, what is the kinetic energy of the block? A) 0.44 J
B) 0.41 J
C) 0.46 J
D) 0.49 J
E) 0.52 J

Question 2

Chemically, helium is

A) an isotope.
B) an element.
C) a mixture.
D) a solid.
E) a compound.