If you are checking the blog page for information to help you with the quiz, you are in luck.
STEPS TO SOLVE VECTOR PROBLEMS
1. If vectors are going in the same direction, you add them.
2. If vectors are going in opposite direction, you find the difference.
3. If two vectors are at right angle to each other, you use the Pythagorean theorem to find resultant.
4. To find the components of a vectors, you use the cos and sin equations.
5. For multiple vectors, you need to use several steps. First examine the vector for directions. If the vector is at any angle other than 0, 90, 180, or 270; you need to use the component equations to break the vector apart. Second, you add the vectors in the same direction, then find the difference of the vectors in opposite directions. You are left with two numbers, those number are used in the Pythagorean theorem to find the resultant.
Monday, September 19, 2011
Thursday, September 8, 2011
Free Fall and Time Dilation
Good Evening PRE-AP-er’s
We have completed Chapter 2 of our textbook. Tonight, we will be discussing free fall and time dilation. You may find information on these topics in section 2-3 in your textbook. Please read the section before joining the discussion. In addition, we are studying for the quiz on tomorrow, which will cover distance, displacement, speed, velocity, and/or acceleration. on tomorrow. Post your questions and one of your classmates or I will assist you.
Here are some things that crossed by mind. Submit your thoughts.
1. Look at picture 2-14 on page 60 and think about this. If the feather and the apple experiment were performed on the moon, where free-fall acceleration is approximately one-sixth the value of free fall acceleration on Earth, how would the picture compare with Figure 2-14?
2. Before Einstein published the special theory of relativity in 1905, physicists struggled with some contradictions in physics. The Principle of Relativity states that the laws of physics are the same in a reference frame. However, it did not allow for the fact that the speed of light is independent of the reference frame from which it was measured in. Read the section and explain in your own words why the passenger on the train (in the discussion page 66-67) measures a shorter time interval.
Here is a question to earn extra credit:
Two stones are thrown from a cliff at the same time with the same speed. One is thrown upward and one downward. Which stone, if either, will hit the ground first? Which stone, if either, will hit the ground with a higher speed? Make your best argument for you prediction. For extra credit on the quiz (10 points), set up an numerical example and solve it to test your predictions. Submit your example on tomorrow before 3pm.
Have a GREAT DISCUSSION!!!!!!!!!!
We have completed Chapter 2 of our textbook. Tonight, we will be discussing free fall and time dilation. You may find information on these topics in section 2-3 in your textbook. Please read the section before joining the discussion. In addition, we are studying for the quiz on tomorrow, which will cover distance, displacement, speed, velocity, and/or acceleration. on tomorrow. Post your questions and one of your classmates or I will assist you.
Here are some things that crossed by mind. Submit your thoughts.
1. Look at picture 2-14 on page 60 and think about this. If the feather and the apple experiment were performed on the moon, where free-fall acceleration is approximately one-sixth the value of free fall acceleration on Earth, how would the picture compare with Figure 2-14?
2. Before Einstein published the special theory of relativity in 1905, physicists struggled with some contradictions in physics. The Principle of Relativity states that the laws of physics are the same in a reference frame. However, it did not allow for the fact that the speed of light is independent of the reference frame from which it was measured in. Read the section and explain in your own words why the passenger on the train (in the discussion page 66-67) measures a shorter time interval.
Here is a question to earn extra credit:
Two stones are thrown from a cliff at the same time with the same speed. One is thrown upward and one downward. Which stone, if either, will hit the ground first? Which stone, if either, will hit the ground with a higher speed? Make your best argument for you prediction. For extra credit on the quiz (10 points), set up an numerical example and solve it to test your predictions. Submit your example on tomorrow before 3pm.
Have a GREAT DISCUSSION!!!!!!!!!!
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