Systems of Measurement
1* Which of the following is not one of the fundamental physical quantities in the SI system? (a) mass (b) length (c) force (d) time (e) All of the above are fundamental physical quantities. (c) Force is not a fundamental
1* A rope hangs vertically from the ceiling. Do waves on the rope move faster, slower, or at the same speed as they move from bottom to top? Explain. They move faster as they move up because the tension increases due to the weight o
Physics 4A Fall 2014 Exam 2 Name
Show all your work for full credit. You have 1 hour 5 minutes to do this exam. No note cards, scratch
papers or electronic devices are allowed.
1. A block of mass M; is connected to a biock of mass M2 and both are pushed a
Physics 4A Fall 2014 Name 0 NS
Show all your work for full credit. No calculators, electronic devices, scratch papers or note cards are
allowed. Please box your answer.
1. A physics student, hoping to earn extra credit, conducts an experiment whi
Physics 4a Fall 2013 Nat-item tum on 5
Show all your work for full eredit. No ealeulators. note cards, cell phones or serateh papers are
1. Two equal point masses or; - M2 = m are at rest atthe base ofa frietionless vertical loop of
Physics 4A Exam Name a! Lila:
Show all your work for full credit. No scratch papte note cards, calculator, cell phones or other
electronic devices are allowed.
1 . A person in an elevator tosses a ball upward at the exact
moment the elevato
2. A particle of mass m sits on :1 horizontal rotating piatforrn. The Lime lor Lhc platfon'n to 111:1]cfw_0
one complete rcvoimion is T. If lhc coefcient. of static friction is pg, what is the maximum
radius the particlc can hint and no! slip oi-i' Lire p
4. (25 points) An ideal] string is wound around a pultcy of 111.2155 M and radius R and a black of
mass m. is attached to the other end. 'thc block is on 1-1 ictionlcs' incline olanglc 0' as ShtJWII.
As the hind; siidca down Th: inclina thc string unwinds
3. (25 puims) 'lwo identical slicks: both of longth I, and Imlss M with moment of inertia ahiiui.
[he Center 0|" mass 1" = '3' ML: are attached to a. pivut ilhuut one end- Initially, one Slick is: held
horizontally and The other i5 allowed to hang vertica
Physics 411 Exam 2 Name QM FIE/3
Dickson - Fall 2011
Show all your work for full credit. No scratch papers: calculators, cell phones or other clccirortic
doviccs are allowed. You have mic (1) hour only.
1. (23 points A ric bullct with 111335, ml. m, is
2. (25 points A small hollow ball 0111is m, I'mllus r and mun-Emu ulinertia ahuut the center of
mass 1', 2,5,. mr, is: initially at rest on the mp Ufa large hemisphere of radius R as shown.
Friction is present 9.0 that when the ball begins to mm-c it roll
Physics 41% Fall 3011 Home" 6 abhlb _
Show all your work for full credit. cfw_A complete, detailed solution please.) No scratch paper. no
cell phones, no MP3 players or other electronic devices are allowed. You have 0N E (l :1 hour
l . A p
Physics4B Winter-2011 Name 8 own ms
Show ali your work for fun credit. No scratch paper, note cards, calcaxors, cell phones or other
electronic devices an: allowed. YOU HAVE ONE HOUR ONLY.
Recallsingaibsinacosbt nbmsmmsgaibm amsb -f+sinasin b
4A Newton's laws homework set 3 (no friction or circular motion):
1. How could a 50 kg object be lowered from a roof as slowly as possible using a cord with a breaking
strength of 200N without breaking the cord?
2. Three separate but equal masses are conn
4A two dimensional kinematics homework set 2.
1. Find the initial launch angle such that the maximum height of a projectile is equal to its horizontal range.
2. Car A is traveling east at 20 m/s at constant velocity. As car A crosses the intersection show
Homework assignment set one for one dimensional kinematics, physics 4A.
1. A dog sees a flowerpot sail up and then back past a window 5.0 ft high. If the total time the pot is in sight is
1.0 seconds, find the height above the window that the pot rises.
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Chapter 3 Motion in Two and Three Dimensions
Motion in Two and Three Dimensions
1* Can the magnitude of the displacement of a particle be less than the distance traveled by the particle along its path? Can its magnitude be more than the distance
Motion in One Dimension
1* What is the approximate average velocity of the race cars during the Indianapolis 500? Since the cars go around a closed circuit and return nearly to the starting point, the displacement is nearly zero, and the average
Note: For all problems we shall take the upward direction as positive unless otherwise stated. 1* How can you tell if a particular reference frame is an inertial reference frame? If Newtons first law is obeyed
Applications of Newtons Laws
Applications of Newtons Laws
1* Various objects lie on the floor of a truck moving along a horizontal road. If the truck accelerates, what force acts on the objects to cause them to accelerate? Force of fri
Work and Energy
1* True or false: (a) Only the net force acting on an object can do work. (b) No work is done on a particle that remains at rest. (c) A force that is always perpendicular to the velocity of a particle never does work on the parti
Conservation of Energy
1* What are the advantages and disadvantages of using the conservation of mechanical energy rather than Newtons laws to solve problems? Generally simpler, involving only scalars; cannot obtain some details, e.g., trajector
Systems of Particles and Conservation of Momentum
1* Give an example of a three-dimensional object that has no mass at its center of mass. A hollow sphere. 2 Three point masses of 2 kg each are located on the x axis at the origin, x = 0.20 m, an
1* Two points are on a disk turning at constant angular velocity, one point on the rim and the other halfway between the rim and the axis. Which point moves the greater distance in a given time? Which turns through the greater angle? Wh
Conservation of Angular Momentum
True or false: (a) If two vectors are parallel, their cross product must be zero. (b) When a disk rotates about its
symmetry axis, is along the axis. (c) The torque exerted by a force is always perpendicular
1* True or false: (a) Keplers law of equal areas implies that gravity varies inversely with the square of the distance. (b) The planet closest to the sun, on the average, has the shortest period of revolution about the sun. (a) False (b
Static Equilibrium and Elasticity
True or false: (a) F = 0 is sufficient for static equilibrium to exist. (b) F = 0 is necessary for static equilibrium
to exist. (c) In static equilibrium, the net torque about any point is zero. (d) An obje
A copper cylinder is 6 cm long and has a radius of 2 cm. Find its mass. V = r2h = 75.4 106 m3; m = 8.93 103V = 0.673 kg
Find the volume, then m = V 2 Find the mass of a lead sphere of radius 2 cm.
Find the volume, then m = V 3 Find t
1* Deezo the Clown slept in again. As he roller-skates out the door at breakneck speed on his way to a lunchtime birthday party, his superelastic suspenders catch on a fence post, and he flies back and forth, oscillating with an am
4A Homework Set 10
1. Verify that a solution to Newton's Second Law is a sinusoid.
2. Derive, from the concept of the total energy of a system, the total energy of an oscillating
system in terms of k and amplitude.
3. A block with mass m rest