SAT Grade 10 Light

Two simple pendulums, A and B, are each 3.0 m long, and the period of pendulum A is T. Pendulum A is twice as heavy as pendulum B. What is the period of pendulum B?

• $\frac{T}{\sqrt{2}}$
  

• T

• $T\sqrt{2}$

• 2T

Grandfather clocks are designed so they can be adjusted by moving the weight at the bottom of the pendulum up or down. Suppose you have a grandfather clock at home that runs slow. Which of the following adjustments of the weight would make it more accurate?

• Raise the weight.

• Lower the weight.

• Remove some mass from the weight.

• Increase the amplitude of swing by a small amount.

What is the wavelength of the wave shown in the figure?

• 8 m

• 4 m

• 1 m

• It cannot be determined from the given information.

What is the frequency of the wave shown in the figure?

• 0.5 Hz

• 2 Hz

• 4 Hz

• 0.25 Hz

Which of the following exhibit simple harmonic motion?

I. A pendulum

II. A mass attached to a spring

III. A ball bouncing up and down, in the absence of friction

• I only

• II only

• III only

• I and !! only

If a wave has frequency  

 $f=10^{14}$  and speed v = 100 m/s, what is its wavelength?

•  $10^{-14}$  

•  $10^{-12}$  

•  $10^{-10}$  

•  $10^{10}$  

Two strings of equal length are stretched out with equal tension. The second string is four times as massive as the first string. If a wave travels down the first string with velocity v , how fast does a wave travel down the second string?

• 
  

  $\frac{1}{4}v$
  

• $\frac{1}{\sqrt{2}}v$

• v

• 2v

A piano tuner has a tuning fork that sounds with a frequency of 250 Hz. The tuner strikes the fork and plays a key that sounds with a frequency of 200 Hz. What is the frequency of the beats that the piano tuner hears?

• 0 Hz

• 0.8 Hz

• 1.25 Hz

• 50 Hz

A ball is attached to an ideal spring and oscillates with a period T. If the mass of the ball is doubled, what is the new period?

• 2T

• T/2

• T

• $T\sqrt{2}$

What is the length of a simple pendulum with a period of 2.0 s?

• 20 m

• 0.99 m

• 1.2 m

• 1.6 m