For the experiment done in the lab, recall that applying r=max to the ball gives the equation Fstring - m4.f2. Combine this result with the result of applying F=may and derive an equation for sinθ in terms of f and L, where θ is the angle between the string and the horizontal.
a. For a given L, does the angle increase, decrease, or stay the same as f is increased?
- increase
- decrease
- stay the same
b. For L=5.0 cm and r=1.15 rev/s, what is the angle? Use g=9.8 m/s^2.
Additional Materials
Force and Acceleration in Circular Motion