Frank says that if you release the string when swinging a ball in a horizontal circle, the ball flies out in the radial direction defined by the string at the instant you release the ball. John says that it flies out along a tangent line perpendicular to the string, and that it then drops straight down to the ground. Which one, if either, is correct?
a. Frank, because the centrifugal force is no longer counteracted by the string.
b. Frank, because balls naturally fly straight out.
c. John, because there is no centrifugal force. d. John, because balls fall straight down when released. e. Neither, because although there is no centrifugal force, and the ball's velocity is tangent to the circle at the instant of release, the ball then follows a parabolic trajectory.
E
You might also like to view...
Compared to the distance between Earth and Mars, the distance between Jupiter and Saturn is
A) much larger. B) about the same. C) much smaller. D) just slightly less.
The position of a 0.700-kg mass undergoing simple harmonic motion is given by x = (0.160 m) cos (?t/16). What is its position at t = 5.80 s?
a. –0.0670 m b. 0.0622 m c. 6.25 m d. 0.0670 m e. 0.610 m
For a 10 mol mixture of air (8 mols nitrogen, N2, and 2 mols oxygen, O2) at 101 kPa, 20ºC, determine the mass concentration and the molar concentration of N2 and O2.
What will be an ideal response?
Phase Angles: At 1.00 kHz, the phase angle of an RLC series circuit with an inductive reactance of 200 ?, a resistance of 200 ? and a certain capacitor is 40.0°. What is the capacitance of the capacitor in this circuit?
A. 1.95 ?F B. 2.95 ?F C. 3.95 ?F D. 4.95 ?F E. 5.95 ?F