Simple Harmonic Motion

According to Hooke’s law, the force exerted by a spring on an object is proportional to

• the mass of the object.

• the displacement of the spring.

• the length of the spring.

• the volume of the object.

The spring constant in a given oscillating mass-spring may be changed by

• increasing the mass.

• decreasing the mass.

• decreasing the initial displacement.

• none of the options

In an oscillating mass-spring system, the velocity of the mass is greatest when the mass is

• a.  int of maximum displacement.

• halfway between the equilibrium point and maximum displacement.

• at the point where acceleration is greatest.

• at the equilibrium point.

In any system in simple harmonic motion, the restoring force acting on the mass in the system is proportional to

• displacement.

• the length of a pendulum

• the mass.

• frequency.

The period of a pendulum may be decreased by

• shortening its length.

• increasing the mass of the bob.

• moving its equilibrium point.

• decreasing the mass of the bob.

As the swinging bob of a pendulum moves farther from its equilibrium position, the pendulum’s _______________ increases.

• frequency

• mass

• restoring force

• length

The gravitational potential energy of the bob of a swinging pendulum is at its maximum when the bob is at

• maximum displacement.

• the equilibrium point.

• the center of its swing.

• minimum displacement.

Stretching a spring increases its ______________ energy.

• mechanical kinetic

• gravitational potential

• vibrational kinetic

• elastic potential

What is the spring constant of a spring that stretches a distance of 8.5 cm when a mass of 370 g is hung on it?

k = -mg/x where m is in kg and x is in meters

• 46,658 N/m

• .003 N/m

• 43 N/m

• 4,266 N/m

The only force acting on the bob in the direction of its motion is

• x component (Fg,x = Fg sin q) known as the restoring force

• x component (Fg,x = Fg cos q) known as the restoring force

• y component (Fg,x = Fg sin q) known as the restoring force

• y component (Fg,x = Fg cos q) known as the restoring force