There is a chalk mark on the side of one tire on my car. When the car is rolling
ID: 2294806 • Letter: T
Question
There is a chalk mark on the side of one tire on my car. When the car is rolling slowly forward, the mark moves past the ground (at the bottom of the tire) twice every second.
What is the period of the chalk-mark's motion?
2.0 rev / sec
2 sec
0.5 sec
2.0 rad / sec
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I build a pendulum by placing a small mass on the end of a light string, hanging the other end of the string from a fixed point, and letting the mass swing back and forth.
Which of the following actions will increase the natural frequency of the pendulum's motion?
Increasing the amount of mass
Increasing the length of the string
Decreasing the amount of mass
Decreasing the length of the string
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2.0 rev / sec
2 sec
0.5 sec
2.0 rad / sec
Explanation / Answer
Question 1 :
period of the chalk-mark's motion = 0.5 sec
Period of the chalk-mark's is the time in which it complete one revolution. the chalk-mark's is completeing two revolution in one second, therefore it will take 0.5 second to complete it's one revolution.
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