PHYSICS 11 FALL 2014
Homework Solutions #1
2. Comment on these three signs in terms of the ideas of units and unit conversions,
precision and significant figures, dimensional analysis, and anything else you think is
relevant or worth mentioning.
a)
b)
c)
PHYSICS 11 FALL 2014
Homework Solutions #9
1.
Misha is getting ready to do some sewing and is holding one end of the thread
when the cat bumps the spool and knocks it off the table. The spool falls towards the
floor, spinning as the thread unwinds.
a) Bef
PHYSICS 11 FALL 2014
Homework Solutions #3
1. Bill drops a cantaloupe from the top of a building. At the same moment, Katniss
releases an arrow straight up from the bottom of the building. When the arrow hits the
canteloupe, the cantaloupes speed is twice
PHYSICS 11 FALL 2014
Homework Solutions #6
1. A cart with very light, low-friction
wheels sits on a ramp. A string, of
negligible mass, runs from the cart, parallel
to the surface of the ramp, over a light,
frictionless pulley, and is connected to a
hangi
PHYSICS 11 FALL 2014
Homework Solutions #12
1.
In a hurricane, many homes are damaged or destroyed when the high wind
simply lifts the roof off of the dwellings. The process involved is called Bernoulli's
Principle The high wind moving over the top of the
PHYSICS 11 FALL 2014
Homework Solutions #2
1.
Jim and Betty normally get along fine, but when theyre traveling they tend to
quarrel. By the time they got on the moving sidewalk at the airport they were no longer
speaking, and while Jim just stood on the m
PHYSICS 11 FALL 2014
Homework Solutions #8
1.
a) The photograph shows world-class high jumper Stefka Kostadinovka as she
clears the bar.
y
Bar
x
At the risk of offending her, we can model her body as a set of discrete blocks, as shown
in the diagram. The
PHYSICS 11 FALL 2014
Homework Solutions #7
1.
A ski lift carries 900 skiers per hour up a slope
with a constant incline of 15 and a vertical drop
(difference in altitude between top and bottom) of 240
meters. It takes 3.5 minutes for the lift to bring eac
PHYSICS 11 FALL 2014
Homework Solutions #11
1. If a car takes a sharp turn at high speed, the
acceleration
wheels on the side of the car inside the turn can
lift off the ground and the car can roll over
towards the outside of the curve. In this problem
yo
PHYSICS 11 FALL 2014
Homework Solutions #5
1.
Dean learns in his Physics 11 lecture that when two people pull on the end of a
rope in a tug-of-war, the forces exerted by each on the other are equal and opposite,
according to Newtons Third Law. As he leave
Physics 11 Homework #5
Due at noon on Friday, October 10, 2014
Each problem is worth 10 points, unless otherwise indicated.
0. List the students with whom you worked on or discussed this assignment. If you didnt
work with anyone, write None. (2 point dedu
Physics 11 Homework #6
Due at noon on Friday, October 17, 2014
Each problem is worth 10 points, unless otherwise indicated.
0. List the students with whom you worked on or discussed this assignment. If you didnt
work with anyone, write None. (2 point dedu
Physics 11 Homework #4
Due at noon on Friday, September 26, 2014
Each problem is worth 10 points, unless otherwise indicated.
0. List the students with whom you worked on or discussed this assignment. If you didnt
work with anyone, write None. (2 point de