Physics 9A Homework #2 Solutions
The bullets have the same starting vertical velocity (zero) and start at the same height, so at all times during their journeys
they remain at the same height as each other and will therefore collide, no matter how
Physics 9A Homework Assignment #5
Consider a head-on collision between a large car and a small one.
Which one undergoes the greater change in momentum as a result of the collision? Does it matter which one is going faster
at the start? Does it mat
Physics 9A Homework Assignment #4
Consider two particles that interact through a conservative force that is either exclusively attractive or repulsive. The scale of
the potential energy function that we use for the interaction of these particles is t
Online Homework 6 Solution
Resistance from Microscopic Ohm's law
Your task is to calculate the resistance of a simple cylindrical resistor
with wires connected to the ends, such as the carbon composition
resistors that are used on electronic circuit board
February 27th, 2015
Formulas are on the last page
1. A lens of focal length 4cm is placed to the left of a lens with focal length -3cm. The spacing between the lenses is 5cm.
An object is placed 6cm to the left of the fi
(a) IDENTIFY: The potential energy is given by Eq. (21.17).
SET UP: [3(6) 2 f) - E = pEcos¢._ where Q is the angle betweenf) and E.
EXECUTE: parallel: in: O and U(0°) zipE
peipendicular: to: 90° and [1"(90'3) = 0
AU: U(90°) U(0°) =pE = (5.0 ><1
Physics 9A Homework #4 Solutions
Assuming the force is exclusively repulsive or attractive (i.e. it doesnt contain elements of both that depend upon separation,
as in the case of a Lennard-Jones potential that we discussed in lecture), then: