Periodic Motion Quiz

The time taken by a pendulum to complete one oscillation is its _____.

• frequency

• period

• amplitude

• speed

The number of cycles or repetitions per second is _________.

• frequency

• period

• amplitude

• speed

The pendulum shown below undergoes a periodic motion. The maximum distance the pendulum bob moves from its equilibrium position is its ___.

• amplitude

• period

• frequency

• speed

Which of the following quantities describing an oscillation can be negative?

• Displacement

• Amplitude

• Period

• Frequency

Hooke’s law is stated mathematically as: F=-kx. What does the negative sign represent?

I. The force is in the opposite direction to

the displacement

II. The force is in the same direction as the

displacement

III. The force tries to restore the object to its

equilibrium position

• I only

• II only

• I and III

• II and III

What is the magnitude of the force acting on a spring with a spring constant of 275 N/m that is stretched 14.3 cm?

• 2.81 N

• 19.2 N

• 39.3 N

• 3932 N

The figure below demonstrates Hooke’s law. What is the extension for a mass of 50 g attached to the spring below?

• x/4

• x/2

• 2x

• 4x

A mass stretches a spring as it hangs from the spring as shown in the figure below. What is the spring constant?

• 0.25 N/m

• 0.35 N/m

• 26 N/m

• 350 N/m

A spring with a spring constant of 27 N/m, is stretched 16 cm. What is the spring's potential energy?

• 0.35 J

• 1.7 J

• 2.2 J

• 4.3 J

What is the value of the spring constant of a spring with a potential energy of 8.67 J when it’s stretched 247 mm?

• 70.2 N/m

• 71.1 N/m

• 142 N/m

• 284 N/m