Author Question: The mass in the figure below slides on a frictionless surface. When the mass is pulled out, ... (Read 59 times)

armygirl · **on:** Jul 28, 2018

The mass in the figure below slides on a frictionless surface.

When the mass is pulled out, spring 1 is stretched a distance x₁ from its equilibrium position and spring 2 is stretched a distance x₂. The spring constants are k₁ and k₂, respectively. The force pulling back on the mass is

a.
k₂x₁.

b.
k₂x₂.

c.
(k₁x₁ + k₂x₂).

d.

.

e.

.

Question 2

A torsional pendulum consists of a solid disk (mass = 2.0 kg, radius = 1.0 m) suspended by a wire attached to a rigid support. The body oscillates about the support wire. If the torsion constant is 16 Nm/rad. What is the angular frequency (in rad/s)?

a.
2

b.
4

c.
6

d.
8

e.
7