For a pendulum formed from a string wrapped around a support and a weight tied on the end of the string, we should take the length of the pendulum to be:

Consider the relationship between the length of a pendulum and its period, how could we plot measurements of length and period in order to obtain a straight line?

To best estimate the uncertainty in the length of such a pendulum, measured with a metre stick with cm markings, we should take

For a pendulum of length L what is the expected period? (You may wish to look at the activity for this weeks lab to review the theory).

Calculate the power output of his arms if he does 131.8 strokes per minute.

Give your answer to zero decimal places in units of W. Do not include the units in your answer i.e. you would write 5 W as 5.

A

swimmer exerts an average horizontal backward force of 80 N with his arm

during each 1.8m long stroke. What is his work output in each stroke?

Give

your answer to zero decimal places in units of J. Do not include the units in

your answer i.e. you would write 8 J as 8.

Calculate the power output of his arms if he does 107.6 strokes per minute.

Give your answer to zero decimal places in units of W. Do not include the units in your answer i.e. you would write 5 W as 5.

A

swimmer exerts an average horizontal backward force of 80 N with his arm

during each 1.8m long stroke. What is his work output in each stroke?

Give

your answer to zero decimal places in units of J. Do not include the units in

your answer i.e. you would write 8 J as 8.

The area under a Force vs Distance graph is the work done.