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TBR Physics Book I page 253 #12
Q: "All of the following statements are true with respect to the total energy of the [pendulum] system except___"
One of the incorrect answer choices (and therefore, a TRUE statement) is:
"The potential energy and kinetic energy are equal to one another at a time that is 1/8 of the period after it had all of the gravitaitonal PE"
How is this true? Let's examine the wave diagram below. 1/8 of the period would be at the 6.25 second mark (period is 50 seconds). At the 6.25 second mark, I don't think the PE = KE. Wouldn't such a relationship only be true if the line were linear (which it clearly is not)?
Q: "All of the following statements are true with respect to the total energy of the [pendulum] system except___"
One of the incorrect answer choices (and therefore, a TRUE statement) is:
"The potential energy and kinetic energy are equal to one another at a time that is 1/8 of the period after it had all of the gravitaitonal PE"
How is this true? Let's examine the wave diagram below. 1/8 of the period would be at the 6.25 second mark (period is 50 seconds). At the 6.25 second mark, I don't think the PE = KE. Wouldn't such a relationship only be true if the line were linear (which it clearly is not)?