1. Hooke’s Law: Finding the Spring Constant  Set the ruler so that the wire aligns with 0.  Place different masses onto the holder and measure the extension of the spring.  Plot a graph of the spring’s force versus the extension of the spring.  Record the spring constant for each spring.  Calculate the force required to stretch each spring 5.25 cm. Email this document to me: yournamehookeslab.doc

2. Logger Pro 3.8 Exploring Projectile Motion Instructions found on my website (Wed. Dec 2 under IB year II) Print the document with your graphs and answers. Draw predictions on the back of the sheet.

3. Centripetal Motion: Finding ‘g’  Measure the flying height of the toy.  Measure the time it takes for the toy to complete 20 revolutions.  Calculate and record the period of the motion.  Plot a graph of Period (y-axis) versus Height  Plot the graph of the log(Period) versus the log(height). The slope of this graph is the exponent n in the relation: T α h n  Plot a straightened curve and record the slope.  Find the relationship between the slope value and the acceleration due to gravity. (Hint: this is difficult – start with a free body diagram and then find a relationship between the variables used in the experiment.) Time(s)RevolutionsPeriod (s)Height (m)

4. Going Ballistic! Finding the velocity of a bullet Part 1  Measure the mass of the ball.  Fire the ballistics pendulum.  Measure the change in the height of the catcher.  Calculate the horizontal velocity of the ball. Part 2  Fire the ballistics pendulum so the ball hits the floor.  Measure the range of the projectile.  Measure the vertical displacement of the projectile.  Calculate the horizontal velocity of the ball. Email this document to me: yournameballisitcslab.doc

5. Power ful Lab: Finding your horsepower  Part 1: Measure the time it takes to run up a continuous set of stairs and the height of those stairs.  Measure your mass (1kg=2.2lbs)  Find the power in your legs.  Part 2: Measure the distance you lift your body while doing a push-up.  Record the time to do ‘x’ number of push-ups.  Calculate the power of your triceps. (Assume that you are lifting 60% of your weight)  Part 3: Measure the distance your lift the lower part of your shoulder blade while doing a sit-up.  Record the time to do ‘x’ number of sit-ups.  Calculate the power of your stomach muscles. (Assume that you are lifting 40% of your weight Legs: Triceps: Stomach: Email this document to me: yournamepowerlab.doc

6. Centripetal Motion Lab Part A: Find the relationship between Fc and velocity by graphing the data. Part B: Find the relationship between velocity and radius. (Put velocity on the x-axis). Part C: Find the relationship between velocity and mass. (mass on x- axis). All graphs should be straightened and the slope of each one compared to constants in the lab (ie look at the Fc equations.) Answer the questions on the lab sheet. Hand this in to me on Monday of next week.