A Method for using Newtons Second Law
Step 1:
Draw a good picture.
Step 2:
Select a system.
Step 3:
Identify all of the forces on the system.
Step 4:
Draw a free body diagram.
Step 5:
Pick a coordinate system and determine
the angles that the forces and a
Physics 131 1.
Final Solutions
Spring 2009
! ! ! ! F3 = ma ! F1 ! F2
^ ^ ^ ^ ^ ^ = 15 N ( ! cos 30 x ! sin 30 y ) ! 24 N ( cos 60 x + sin 60 y ) ! 40 N ( sin 20 x ! cos 20 y ) ^ ^ = !38.7 N!x + 9.3 N!y
= 39.8 N, 166.5
this direction is 43.5 CW from the ac
Physics 131
Midterm
Spring 2009
Name
PLEASE READ THIS FIRST:
Time limit: 55 minutes
Please remove hats and turn off and put away any communication devices.
You may use one sheet of prepared notes (8 x 11, both sides).
Perform all of your work on blank pap
Midterm Solutions
Physics 131
km/h
!v 240 km/h
= 0.370 m/s 2
=
= 80
min
!t
3 min
a)
a=
b)
!x = vavg !t = (120 km/h ) (.05 h ) = 6.0 km
c)
1.
F = ma = 259 kN
a)
x = xi +
8.0 s
2.
Professor Mallinckrodt
!
0
" 1%
v dt = area under curve = 0 + $ ' ( 8.0 s ) (
Physics 131 Section 1
Final Exam
Spring 2009
Name
Your name above signifies that you have read and understood the exam policies that were distributed in
class. Extra copies are available.
1. [15 pts] The object at right is acted on by exactly three forces
Steps for solving a problem in
constant acceleration kinematics
Read the problem carefully paying close attention to the
situation being described and almost no attention to what it asks
you to find.
Make sketches of the physical situation at each potenti
Physics 131 Name PLEASE READ THIS FIRST:
Final
Fall 2006
Time limit: 125 minutes Please remove hats and turn off and put away any communication devices. You may use two sheets of prepared notes (8 x 11, both sides). Please staple it to the back of this e
Physics 131 Name PLEASE READ THIS FIRST:
Midterm
Fall 2005
Time limit: 55 minutes Please remove hats and turn off and put away any communication devices. You may use one sheet of prepared notes (8 x 11, both sides). Perform all of your work on these s
Dynamics of Uniform Circular Motion
Introduction:
In simple kinematical systems, kinematic equations may be used to determine accelerations of
changing velocities or constant velocities which has no accelerations. However, in a uniform
circular motion sys
CS 140-01 Introduction to Computer Science
Lab Assignment #4
Thursday, 12/4/2014
For this lab, students will work in pairs. If questions arise, try to answer them within the pair before
turning to another pair for help. Ask the instructor for help as a la
Homework Assignment #1
The central components of our nervous system consists of the brain and the spinal cord. The
two of these elements in our body are complementary to each other, such that all body limbs and
organs are controlled by the brain, and that
CS 140-01 Introduction to Computer Science
Lab Assignment #3
Tuesday, 11/18/2014
For this lab, students will work in pairs. If questions arise, try to answer them within the pair
before turning to another pair for help. Ask the instructor for help as a la
1.
Giancoli 3.61
2. The cliff divers of Acapulco push off horizontally from rock platforms about 35m above the water, but
they must clear rocky outcrops at water level that extend out into the water about 5m from the base of
the cliff directly under the l
CS 140-01 Introduction to Computer Science
Lab Assignment #2
Thursday, 10/23/2014
For this lab, students will work in pairs. If questions arise, try to answer them within the pair
before turning to another pair for help. Ask the instructor for help as a l
Steps for applying the
impulse-momentum theorem
Step 1: Draw good pictures of each important instant of time.
Label them with all known and unknown speeds,
positions, angles, masses, etc.
Step 2: Choose a specific object or objects (the system) whose
mome
Steps for applying the
work-energy theorem
Step 1: Draw good pictures of each important instant of time.
Label them with all known and unknown speeds,
positions, angles, masses, etc.
Step 2: Choose a specific object (the system) whose energy
you will anal
PHY131
Quiz4(Ch4)
Name
[email protected]/s2
v Y =vsin30
v x =vcos30
v Y =20*
v x =20*.866
a. 10.0m/s
v Y =10m/s
v x =17.34m/s
b. 17.3m/s
1. (1)Arockisthrownat20m/s30abovethehorizontal
froma10mbuilding,whatv Y ?
c. 16.8m/s
d. 20m/s
e. Noneoftheabove
2. (1)Whatishei
The minimum distance required to stop a car moving at 35.0 mi/hr is 40.0 ft. What is the minimum
stopping distance for the same car moving at 55.0 mi/hr, assuming the same rate of acceleration?
35mile/hour(5280ft/1mile)(3600sec/1hr)=511/3ft/sec
35mph=511/
PHY131
Quiz4(Ch4)
Name
[email protected]/s2
v Y =vsin30
v x =vcos30
v Y =20*
v x =20*.866
a. 10.0m/s
v Y =10m/s
v x =17.34m/s
b. 17.3m/s
1. (1)Arockisthrownat20m/s30abovethehorizontal
froma10mbuilding,whatv Y ?
c. 16.8m/s
d. 20m/s
e. Noneoftheabove
2. (1)Whatishei
PHY131
Quiz4(Ch4)
Name
[email protected]/s2
v Y =vsin30
v x =vcos30
v Y =20*
v x =20*.866
a. 10.0m/s
v Y =10m/s
v x =17.34m/s
b. 17.3m/s
1. (1)Arockisthrownat20m/s30abovethehorizontal
froma10mbuilding,whatv Y ?
c. 16.8m/s
d. 20m/s
e. Noneoftheabove
2. (1)Whatishei
1.
Giancoli 3.61
2. The cliff divers of Acapulco push off horizontally from rock platforms about 35m above the water, but
they must clear rocky outcrops at water level that extend out into the water about 5m from the base of
the cliff directly under the l