CHAPTER
2
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
CHAPTER
19
Heat and the First Law of Thermodynamics
1*
Body A has twice the mass and twice the specific heat of body B. If they are supplied with equal amounts of heat, CA = 4CB; TA = TB/4
how do the subsequent changes in their temperatures com
CHAPTER
20
The Second Law of Thermodynamics
1*
Where does the energy come from in an internal-combustion engine? In a steam engine? steam.
Internal combustion engine: From the heat of combustion (see Problems 19-106 to 19-109). Steam engine: Fr
CHAPTER
15
Wave Motion
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
CHAPTER
14
Oscillations
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 w
CHAPTER
12
Static Equilibrium and Elasticity
1* 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. (
CHAPTER
11
Gravity
1* True or false: (a) Kepler's 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
CHAPTER
10
Conservation of Angular Momentum
1* 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 perp
CHAPTER
9
Rotation
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
CHAPTER
8
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 =
CHAPTER
7
Conservation of Energy
1* What are the advantages and disadvantages of using the conservation of mechanical energy rather than Newton's laws to solve problems? Generally simpler, involving only scalars; cannot obtain some details, e.g.,
CHAPTER
6
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
CHAPTER
5
Applications of Newton's 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 friction between the objects and
CHAPTER
4
Newton's Laws
Note: For all problems we shall take the upward direction as positive unless otherwise stated. 1* 2 How can you tell if a particular reference frame is an inertial reference frame? Suppose you find that an object in a par
CHAPTER
3
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 traveled? Explain. The magnitude of
CHAPTER
1
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 f