2. Physics 100 Lab Rotational Motion and Gravitation PART A: Exploring Rotational Motion Consider a standard wall clock, with an hour hand, a minute hand, and a second hand, as shown below. All questions in this part refer to this situation. You may assume that the clock is about 12in (30cm) wide. 11 12 1. Through how many degrees does the second hand move every second? 10, 3 2. Through how many degrees does the minute hand move every second? 4. 3. (a) Through how many radians does the second hand move every second? There are 2n radians in a circle. (b) What is the angular speed of the second hand in radians/second? 4. A bug is crawling very slowly along the second hand. (a) Where would the tangential speed of the bug be the largest? Explain. (b) How fast is the bug moving when it is moving its fastest? Explain. (c) Is it possible for the bug to remain at rest while clinging to the second hand? Explain. 5. How does the angular speed of the hour hand compare to the angular speed of someone standing on the Earth (as it spins on its axis)? Explain. 6. How does the angular speed of someone standing on the Earth (as it spins) compare to the angular speed of the Earth traveling around the Sun? Explain.
2. Physics 100 Lab Rotational Motion and Gravitation PART A: Exploring Rotational Motion Consider a standard wall clock, with an hour hand, a minute hand, and a second hand, as shown below. All questions in this part refer to this situation. You may assume that the clock is about 12in (30cm) wide. 11 12 1. Through how many degrees does the second hand move every second? 10, 3 2. Through how many degrees does the minute hand move every second? 4. 3. (a) Through how many radians does the second hand move every second? There are 2n radians in a circle. (b) What is the angular speed of the second hand in radians/second? 4. A bug is crawling very slowly along the second hand. (a) Where would the tangential speed of the bug be the largest? Explain. (b) How fast is the bug moving when it is moving its fastest? Explain. (c) Is it possible for the bug to remain at rest while clinging to the second hand? Explain. 5. How does the angular speed of the hour hand compare to the angular speed of someone standing on the Earth (as it spins on its axis)? Explain. 6. How does the angular speed of someone standing on the Earth (as it spins) compare to the angular speed of the Earth traveling around the Sun? Explain.
Physics for Scientists and Engineers, Technology Update (No access codes included)
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Chapter10: Rotation Of A Rigid Object About A Fixed Axis
Section: Chapter Questions
Problem 10.93CP: A merry-go-round is stationary. A clog is running around the merry-go-round on the ground just...
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4(b) How fast is the bug moving when it is moving its fastest? Explain.
Transcribed Image Text:2.
90
Physics 100 Lab
Rotational Motion and Gravitation
PART A: Exploring Rotational Motion
Consider a standard wall clock, with an hour hand, a minute hand, and a second hand, as shown
below. All questions in this part refer to this situation. You
may assume that the clock is about 12in (30cm) wide.
1. Through how many degrees does the second hand move
every second?
11 12
10.
2. Through how many degrees đoes the minute hand move
3
every second?
3. (a) Through how many radians does the second hand move
every second? There are 2n radians in a circle.
4.
(b) What is the angular speed of the second hand in radians/second?
4. A bug is crawling very slowly along the second hand.
(a) Where would the tangential speed of the bug be the largest? Explain.
(b) How fast is the bug moving when it is moving its fastest? Explain.
(c) Is it possible for the bug to remain at rest while clinging to the second hand? Explain.
5. How does the angular speed of the hour hand compare to the angular speed of someone
standing on the Earth (as it spins on its axis)? Explain.
6. How does the angular speed of someone standing on the Earth (as it spins) compare to the
angular speed of the Earth traveling around the Sun? Explain.
Expert Solution
Step 1
We have clock of total width d=30 cm so the radius or size of a hand R=d/2=30/2=15 cm. Also we know that the second hand covers in 60 s.
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