Questions from Modern Physics

Q: You want to find the moment of inertia of a complicated machine

You want to find the moment of inertia of a complicated machine part about an axis through its center of mass. You suspend it from a wire along this axis. The wire has a torsion constant of 0.450 N.m/...

Q: The balance wheel of a watch vibrates with an angular amplitude ϴ

The balance wheel of a watch vibrates with an angular amplitude ϴ, angular frequency v, and phase angle f = 0. (a) Find expressions for the angular velocity du>dt and angular acceleration d2

Q: You pull a simple pendulum 0.240 m long to the

You pull a simple pendulum 0.240 m long to the side through an angle of 3.50° and release it. (a) How much time does it take the pendulum bob to reach its highest speed? (b) How much time does it take...

Q: Suppose that the left-traveling pulse in Exercise 15.32

Suppose that the left-traveling pulse in Exercise 15.32 is below the level of the unstretched string instead of above it. Make the same sketches that you did in that exercise. Exercise 15.32: Two tr...

Q: An 85.0-kg mountain climber plans to swing down

An 85.0-kg mountain climber plans to swing down, starting from rest, from a ledge using a light rope 6.50 m long. He holds one end of the rope, and the other end is tied higher up on a rock face. Sinc...

Q: A building in San Francisco has light fixtures consisting of small 2

A building in San Francisco has light fixtures consisting of small 2.35-kg bulbs with shades hanging from the ceiling at the end of light, thin cords 1.50 m long. If a minor earthquake occurs, how man...

Q: A certain simple pendulum has a period on the earth of 1

A certain simple pendulum has a period on the earth of 1.60 s. What is its period on the surface of Mars, where g = 3.71 m/s2 ?

Q: After landing on an unfamiliar planet, a space explorer constructs a

After landing on an unfamiliar planet, a space explorer constructs a simple pendulum of length 50.0 cm. She finds that the pendulum makes 100 complete swings in 136 s. What is the value of g on this p...

Q: A machine part is undergoing SHM with a frequency of 4.

A machine part is undergoing SHM with a frequency of 4.00 Hz and amplitude 1.80 cm. How long does it take the part to go from x = 0 to x = -1.80 cm?

Q: In the laboratory, a student studies a pendulum by graphing the

In the laboratory, a student studies a pendulum by graphing the angle u that the string makes with the vertical as a function of time t, obtaining the graph shown in Fig. E14.50. (a) What are the peri...