Physics 120
Term Test #2
Friday November 19, 2004
Only a basic, nonprogrammable calculator is allowed. You have approximately 50 minutes to complete this test.
Your work must be neat and easy to follow. If what you are doing is not clear, you will not get
Physics 120
2013 March 15
Midterm Exam 2 Solutions
Surname: Solutions
Academic Honesty: In accordance with the Academic Honesty Policy (T10.02), academic dishonesty in any form
will not be tolerated. Prohibited acts include, but are not limited to, the
Physics 120 Practice Midterm Exam
Name_
1) Two identical objects A and B fall from rest
from different heights to the ground. If
object B takes twice as long as A to reach
the ground, what is the ratio of the heights
from which A and B fell? Neglect air
r
l.
PHYS 120
Tutorial #1 1
Two astronauts, each having a smass 75 kg, are connected by a light rope 10 m
long. They are isolated in space, and are initially revolving around their common
center of mass once every 6 seconds. They now pull in on the rope, ha
PHYS 120
Tutorial #7
1. Initially, block 1 with mass m1 = 1 kg is moving on a frictionless table with
velocity 01:1 mfs and block 2 with mass m2 = 0.5 kg is at rest. Block 1
collides elastically with block 2.
a) Find the velocities of block 1 and block
Physics 120: Tutorial 1
1. Usain Bolt’s position along the track during his World Record setting
run for the 100m sprint in Berlin in 2009 can be fairly well represented
by the following two formulae for times greater than his reaction time (i.e.
the time
l.
PHYS 120
Tutorial #12
A block of mass M rests on a frictionless table and is
connected to the right end of a spring of spring
constant k. The left end of the spring is ﬁxed to a
vertical wall. At time t = 0 s the block is at x = 2.6
cm and moving to th
PHYS 120
Tutorial #10
1. A uniform horizontal beam 8 m long is attached by a frictionless pivot to a wall. A
cable making an angle of 37o, attached to the beam 5 m from the pivot point, supports
the beam, which has a mass of 600 kg. The breaking point of
PHYSICS 120
Mechanics & Modern Physics
Written Assignment #2
Write complete solutions to all problems below.
Due Tuesday, March 22, 2016 at 10:30 pm
1.
A bowling ball of radius R = 10.8 cm is given an initial velocity v0 = 2.0 m/s down the bowling
lane an
PHYS 120 7 Spring 2013 a Week 10 (Tutorial 9)
Tutorial: Name:
Group: Student ID:
Rotational Statics and Dynamics: Yo-Yo
A yo-yo has mass M and outer radius R. The central stem has negligible mass and radius r and a
string of negligible mass is wrapped aro
Center of mass
1 m 1 m
Find the center of mass of the uniform sheet of plywood. Let
the coordinate origin be at the lower left corner of the sheet.
:1) Consider this as a system of effectively two sheets,
letting one have a negative mass to account for th
Physics 120
2013 Februrary 8
Midterm Exam 1 SOLUTIIONS
SOLUTIONS
Academic Honesty:
In accordance with the Academic Honesty Policy (T10.02), academic dishonesty in any
form will not be tolerated. Prohibited acts include, but are not limited to, the follo
PHYS 120
Today's (& Mondays)
Concepts:
Dr. Bernd Stelzer
a) Combining Transla;onal and
Rota;onal Mo;on
b) Work and Energy in Rota;ons
c) Rolling
Your Comments
slightly confused. there are a lot of values and deriving of formulas.
PHYS 120
Today's Concepts:
Dr. Bernd Stelzer
a) Rota2onal Kine2c Energy
b) Moment of Iner2a
Your Comments
! I understand the rotational kinematics but got very lost at moments of
inertia, please go over it in class!
! Do we need to derive t
Z)j,)fituf5 60%, 3C J lm/C 6:5 4; Cdefm (WO) 6/ 6) M (1/)
. If
L Vr 47% 40 r 2570 fr; (Ii) Mi/V)- 4W aliae/ m M) for
V3dX/agl75: '[51621L8f40 => >g455
C) JWfds (,0an 0) M W/adjjm ) 36/ gigazi/TO for
(mm) M (1/)!
; 1 2 3
V Sa/M; 676 .+Z761-C ) W0) 10:6 )
PHYS 120
Tutorial #1
1. The position of a particle moving on an axis is given by:
x
3.2 4.4t 3
7.1t
with x in meters and t in seconds. What is the velocity at t = 2.1 s? Is the velocity
constant or changing? What is the acceleration at t = 2.1 s? Is the a
PHYS 120
Tutorial #3
1. You are part of a team to help design the atrium of a new building. Your boss, the
manager of the project, wants to suspend a 10-kg sculpture high over the room by
hanging it from the ceiling using thin, clear fishing line (string)