Understanding Motion problem

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In summary, a recording timer was used to produce 165 dots over a 2.5 second time interval. The period of the timer is 0.015 seconds and the frequency is 66 hertz. The change in time between the ninth and thirteenth dot is 0.06 seconds.
  • #1

Homework Statement

A recording timer is used to produce a section of ticker tape. 165 dots were
produced over a 2.5 s time interval.
a) Determine the period of the timer. 0.015 seconds
b) Determine the frequency of the timer. 66 hertz
c) What is the change in time between the ninth and thirteenth dot?
Im taking this online and for this quiz it didn't have the answers to check your work, I'm just unsure of how to do C.

Homework Equations

T=(change in time)/N(vibrations) f(frequency)=N/(change in time)

The Attempt at a Solution

T=(change in time)/N 0.015=(change in time)/4 = 0.06 seconds
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  • #2
In a, you calculated that there is one dot every 0.015 seconds, right?
In other words, 0.015 seconds is the time between any dot and the next.
How long is there between any dot and the second next dot (e.g. between 1 and 3, or between 9 and 11)?

(By the way, a and b are correct, although I would prefer to write 2.5/165, 5/330 or 1/66 second rather than the rounded 0.015).

1. What is motion?

Motion is the change in position of an object with respect to time. It is described using concepts such as distance, displacement, speed, velocity, and acceleration.

2. How is motion measured?

Motion can be measured using various tools and techniques such as rulers, stopwatches, speedometers, and motion sensors. These tools measure different aspects of motion, such as distance, time, and speed, and can help in understanding the motion of an object.

3. What is the difference between speed and velocity?

Speed is a measure of how fast an object is moving, while velocity is a measure of how fast an object is moving in a specific direction. Speed is a scalar quantity, while velocity is a vector quantity.

4. How is acceleration related to motion?

Acceleration is the rate of change of an object's velocity. If an object's velocity changes, it is said to be accelerating. Acceleration can be positive, negative, or zero, depending on the direction of the change in velocity.

5. How does Newton's laws of motion explain motion?

Newton's laws of motion describe the relationship between the forces acting on an object and its motion. The first law states that an object at rest will remain at rest and an object in motion will remain in motion unless acted upon by an external force. The second law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. The third law states that for every action, there is an equal and opposite reaction.

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