Week 11 Physical

Which would have the longest period?
Pendulum A: A 200-g mass attached to a 1.0-m length string
Pendulum B: A 400-g mass attached to a 0.5-m length string

• Pendulum A
• Pendulum B
• A & B are the same

A pendulum is 0.75 meters long and has a period of 4.17 seconds. The Pendulum is on an unknown planet.  What is the acceleration of gravity of the Unknown Planet?

• 9.8 m/s₂
• 3.4 m/s₂
• 1.7 m/s₂
• Greater than 9.8 m/s₂

Tags

NGSS.HS-PS2-4

An oscillator completes 30 cycles in 15 seconds, what is its period? 

• 30 seconds
• 2 seconds
• 0.5 seconds
• 2 hertz

TWO PARTS: A wave in Lake Michigan arrives on the shore every 5 seconds.  It's period is ____ and its frequency is ____.  (*Answers in that order) 

• 5 seconds; 0.2 hertz
• 0.2 seconds; 2 hertz
• 5 seconds; 50 hertz
• 50 seconds; 0.2 hertz

Tags

NGSS.HS-PS4-1

A mass attached to a spring vibrates back and forth. At the equilibrium position, the

• acceleration reaches a maximum.
• velocity reaches a maximum.
• net force reaches a maximum.
• velocity reaches zero.

Which of the following is/ are characteristics of simple harmonic motion?

I. The acceleration is constant .

II. The restoring force is proportional to the displacement.

III. The frequency is independent of the amplitude.

• II only

• I and II only

• I and III only

• II and III only

• I, II, and III

A spring with a natural length 40 cm and a spring constant of 400 N/m is hung vertically with a 10 kg mass attached to the end. Assuming the spring's mass is negligible, what will be the final length of the spring when it reaches equilibrium?

• 25 cm

• 35 cm

• 40 cm

• 50 cm

• 65 cm

Tags

NGSS.HS-PS2-1

What is the definition of the period of a pendulum?

• one oscillation
• the time taken for one oscillation
• the time for one swing back and forth
• swing from A to B to A

What is the only thing that increases the period of a pendulum?

• increase the length of the pendulum
• decrease the length of the pendulum
• increase the weight of the pendulum bulb
• decrease the weight of the pendulum bulb