Cup-sling Lab: Circular Motion Discovery Activity Analysis I A. Does a force have to be continually exerted by the elastic band to keep the cup-sling whirling at a constant speed? How did you know?
B. When the cup-sling moved in a circle, it was changing direction all the time. What caused the cup-sling to change direction? C. When the cup-sling moved in a circle at a constant speed, did it accelerate? Explain your answer.
D. What happens to the length of the elastic band as the force needed to whirl the cup-sling in a horizontal circle increases?
E. Along what path would the cup follow if the band were released while the cup was whirling? F. Repeat the experiment. Record the time it takes to complete 10 horizontal circles and estimate the length of the radius using a meter stick. Record results and calculate the tangential speed of the cup using the formula on the board.
Analysis II A. What happened to the total length of the elastic bands when you increased the mass in the cup?
B. How did the increase in mass affect the force by the elastic band?
C. If a mass moves in a straight line and more mass is added, does the inertia increase, decrease, or stay the same? D. Do you think that the same thing happens to a body in circular motion? Explain
E. What force is responsible for keeping the water in the cup during the circular motion?
F. What force is responsible for keeping the cup in circular motion?
G. Repeat the experiment. Record the time it takes to complete 10 horizontal circles and estimate the length of the radius using a meter stick. Record results and calculate the tangential speed of the cup using the formula on the board.
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