Question

For the experiment done in lab, recall that applying ΣF_x = ma_x to the ball gives the equation F_string = m4π²f ²L. Combine this result with the result of applying ΣF_y = ma_yand derive an equation for sin θ in terms of f and L. θ is the angle between the string and the horizontal.

(a) For a given L, does the angle θ increase, decrease, or stay the same as f is increased?

a) increase

b) decrease

c) stay the same

(b) For

L = 50.0 cm

and

f = 1.20 rev/s,

what is the angle θ? (Use

g = 9.80 m/s².)

Answer 1

Strin ne ng