swinging pendulum

Draw a simple pendulum and label the locations of the maximum and minimum of (a) speed (b) acceleration (c) kinetic energy (d) potential energy

Understanding momentum, impulse and forces in the sport of soccer.

1. Identify and explain propulsive and breaking forces in soccer? 2. Provide three examples where momentum influences soccer? 3. In soccer, outline how impulse can be increased. These questions are for a post-grad degree in elite sports coaching - (biomechanics module)

Electrostatic Energy

1. A negative charge in an electric field moves from a point where the potential is zero to a point whre it is -100V. Discuss the energy change and the work done. 2. Imagine a hollow, spherical, positively charged conductor of radius R that is far away from any other bodies. Draw a graph of its potential V as a function of r ...continues

Understanding curved motion.

Fill in the blank: A moving object's ________ causes it to travel in a straight line.

Physical Optics

Q: If you put a few drops of liquid in a cup of soap with a little water and shake it around, making a great froth of bubbles. After several seconds, the bubbles will begin to show bright rainbow color patterns. Why must you wait before the colors appear? Q: If you take a very close look at a worn surface under direct sunligh ...continues

Physical optics

In an experiment where you light a long filament vertical light bulb. If you look at it from several meters away through a vertical slit cut in a 3 X 5 card, you will see a lovely fringe system. Explain what's happening. Multiple choice: 1. Light linearly polarized in the plane-of-incidence impinges on the surface of a glass ...continues

Physical optics

Multiple choice: 1. The middle of the first-order maximum, adjacent to the central bright fringe in the double-slit experiment, corresponds to at a point where the optical path length difference from the tow apertures is equal to: (a) h (=lander) (b) 0 (c) 1/2h (d) 1/4h (e) none of the above. Explain your choice. 2. A narrow ...continues

The propagation of Light: Scattering

Question: 1. Modern picture frames sometimes come with "nonreflecting" glass (i.e., glass whose surface has been deliberately made rough). What does it actually accomplish? 2. How is it that you can see your image in the surface of a polished black automobile? Explain what's happening. What allows you to see the gin in a gla ...continues

The propagation of Light: Scattering

Multiple choice: 1. Compared to an object in front of it, the image in a plane mirror is always: (a) smaller (b) virtual (c) three times far away (d) distorted (e) none of these. Explain your choice. 2. A chicken is standing 1.0 m in front of a vertical plane mirror. A woman is standing 5.0 m from the mirror, behind and in l ...continues

Sound Waves

1. Imagine two symmetrical pulses that are identical in every way, except tht one is inverted. These pulses are moving toward each other on a rope in opposite directions. What happens to the energy of the rope at the instant of complete cancellation? 2. In the real world, a pulse sent down a very long, taut rope diminishes in ...continues