General information about a Pendulum

In summary, the period of a pendulum suspended in a rocket ship is affected by the gravitational field.
  • #1
squib
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0
More Physics... A simple pendulum suspended in a rocket ship has a period T0. Assume that the rocket ship is near the Earth in a uniform gravitational field. Give ALL correct answers,
I'm assuming T= 2pi(l/g)^.5

A) If the ship moves upward with a constant velocity, the period increases.

velocity has nothing to do with l or g, so no change, so FALSE

B) If the ship accelerates upward, the period decreases.

This will cause a smaller g, and thus INCREASE the period, so FALSE

C) If the mass of the pendulum doubles, the period increases.

MASS is not considered here, so no change, so FALSE

D) If the ship accelerates downward at 9.8 m/s2, the pendulum will oscillate faster.

G will increase here, so the period will be smaller, and thus oscillate faster, so TRUE.

E) If the length of the pendulum is doubled, the new period will be: the square root of two times T0.
This seems true by the formula too... TRUE

Yet DE is not right. I even tried ADE in case a constant velocity outward (A) meant the force of gravity would lessen... but still no luck.
Any help here?
 
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  • #2
squib said:
More Physics... A simple pendulum suspended in a rocket ship has a period T0. Assume that the rocket ship is near the Earth in a uniform gravitational field. Give ALL correct answers,
I'm assuming T= 2pi(l/g)^.5

B) If the ship accelerates upward, the period decreases.

This will cause a smaller g, and thus INCREASE the period, so FALSE

You need to rethink this one. After you understand this, go on to the later ones.
 
  • #3
squib said:
B) If the ship accelerates upward, the period decreases.

This will cause a smaller g, and thus INCREASE the period, so FALSE
Have you been in an elevator? Remember that when it begins moving upward you feel momentarily heavier? So g increases.
 
  • #4
Haha, wow, super stupid mistake there by me. Thanks
 

1. What is a pendulum?

A pendulum is a weight suspended from a pivot point that can swing back and forth due to the force of gravity. It is used to measure time and has been used in scientific experiments for centuries.

2. What factors affect the swing of a pendulum?

The length of the pendulum, the mass of the weight, and the force of gravity are the main factors that affect the swing of a pendulum. Other factors such as air resistance and friction can also have an impact.

3. What is the period of a pendulum?

The period of a pendulum is the time it takes for one complete swing, from left to right and back to left. It is dependent on the length of the pendulum and the force of gravity, and can be calculated using the formula T = 2π√(L/g), where T is the period, L is the length, and g is the acceleration due to gravity.

4. How is a pendulum used in timekeeping?

Pendulums are used in timekeeping devices such as grandfather clocks and pendulum clocks. The regular swing of the pendulum allows for accurate timekeeping, with one complete oscillation representing a specific unit of time, such as a second or a minute.

5. What is the relationship between the length of a pendulum and its period?

The length of a pendulum and its period are inversely related, meaning that as the length of the pendulum increases, the period also increases. This relationship was first discovered by Galileo and is known as the law of isochronism.

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