What is the mass, in slugs, of an object that weighs 161 lb on Earth? Use the standard sea-level value of g = 32.2 ft/sec^2.
Explanation
This is a quantitative problem applying the weight-mass relationship (W=mg) in the U.S. customary system to calculate mass in slugs.
Other questions
Who is credited with the beginning of a rational understanding of dynamics through careful observations concerning bodies in free fall, motion on an inclined plane, and motion of the pendulum?
Dynamics is composed of two distinct parts. One is kinematics, the study of motion without reference to the forces causing it. What is the other part?
What is the name of the basic frame of reference for the laws of Newtonian mechanics, which is imagined as a set of rectangular axes with no translation or rotation in space?
How is 'mass' defined in the context of dynamics?
Under what condition can a physical body, like an airplane, be treated as a 'particle'?
What does Newton's Second Law of Motion state about the acceleration of a particle?
According to Newton's Second Law, what force is required to give a 5 kg mass an acceleration of 2 m/s^2?
In the U.S. customary system of units, force, length, and time are base units. Which quantity has a derived unit?
Why is the U.S. customary system of units termed a 'gravitational system'?
Newton's law of gravitation is given by the equation F = G*(m1*m2)/r^2. What does the term 'G' represent?
An object has a mass of 1 kg. On the surface of the earth (radius R), it has a weight W. What would its weight be at an altitude of 2R above the surface of the earth?
What is the internationally adopted standard value for the gravitational acceleration (g) relative to the rotating earth at sea level and at a latitude of 45 degrees?
The true weight of a body is calculated using its mass and the absolute acceleration due to gravity. The apparent weight measured by a scale on the Earth's surface is slightly different due to the Earth's rotation. The ratio of the apparent weight to the apparent acceleration due to gravity gives what value?
An equation is given as Fx = (1/2)mv^2, where F is force, x is distance, m is mass, and v is velocity. What principle can be used to check if this equation is potentially correct?
In solving dynamics problems, what is the primary advantage of a symbolic solution over a numerical solution?
In the 'Method of Attack' for solving dynamics problems, what should be drawn to clearly define the system being analyzed and account for all external forces?
What does Newton's First Law, the law of inertia, imply about a particle if the net force on it is zero?
A payload module weighs 100 lb on the surface of the earth. What is its approximate mass in kilograms? Use the surface-level value of g = 9.80665 m/s^2 and the conversion 1 lb = 4.4482 N.
A payload module with a surface weight of 100 lb is taken to an altitude of 200 miles. Given the Earth's mean radius is 3959 miles and the absolute g at the surface is 32.234 ft/sec^2, what is the acceleration of gravity (g) at this altitude?
A module is inside a space shuttle in a circular orbit at an altitude of 200 miles. What is the weight of the module under these conditions?
In what publication did Isaac Newton first state the laws governing the motion of a particle and formulate the law of universal gravitation?
When can corrections for the Earth's motion be neglected in mechanics problems?
What is the key difference between a 'dimension' and a 'unit'?
What is the dimensional representation of velocity?
The 1980 International Gravity Formula, g = 9.780327(1 + 0.005279sin^2(y) + ...), is based on what model of the Earth?
If a body has a mass of 1 slug, what is its weight in pounds on a planet where the acceleration of gravity is 10 ft/sec^2?
What is the primary purpose of studying engineering mechanics?
Which statement accurately describes the relationship between the weight of a body and its mass?
In the SI system, a force of 1 newton is defined as the force required to give a 1-kilogram mass what acceleration?
What is the force of mutual gravitational attraction between two 1 kg spheres whose centers are 1 meter apart? Use G = 6.673 x 10^-11 m^3/(kg*s^2).
If a particle's acceleration is directly proportional to the resultant force on it, what can be concluded about its mass?
Which of these is NOT an application of dynamics mentioned in the textbook?
If you weigh 180 lb on Earth, what is your mass in slugs? Use g = 32.2 ft/sec^2.
At what altitude h above the Earth's surface would an object's weight be reduced to one-half of its earth-surface value? Express h in terms of the Earth's radius R.
What is the primary reason for placing a stronger emphasis on the SI metric system in the textbook?
If a physical relation is found to be dimensionally homogeneous, what can be concluded?
What distinguishes the engineering of mechanics from the science of mechanics, according to the textbook's philosophy?
If a particle is subjected to a resultant force F, Newton's second law can be stated as F = ma. In this equation, in what frame of reference must the acceleration 'a' be measured?
A body has a weight of 445 N. What is its approximate weight in pounds? Use the conversion 1 lb = 4.4482 N.
The variation of gravitational acceleration g with latitude y (in radians) and the Earth's rotation is given by the International Gravity Formula. Which of the following best describes this variation from the equator to the poles?
For a particle of mass 'm' and velocity 'v', its kinetic energy is given by (1/2)mv^2. What are the dimensions of kinetic energy in terms of M, L, and T?
The textbook describes a dual thought process necessary for formulating problems in dynamics. This involves thinking in terms of both:
What is the weight in Newtons of a car with a mass of 1500 kg? Use the standard approximate value of g = 9.81 m/s^2.
A particle of mass 'm' is subject to a resultant force 'F'. Newton's second law is also sometimes expressed as the resultant force being proportional to the time rate of change of what quantity?
What is the primary reason that using the mass unit 'lbm' (pound-mass) is avoided in the textbook in favor of the 'slug'?
The weight of a body is a force. In which units should it always be expressed in the SI and U.S. customary systems, respectively?
The text mentions a notational shorthand where a dot over a symbol indicates a derivative with respect to what variable?
What does a double dot over a symbol, such as x-double-dot, represent?
A key step in the 'Method of Attack' for problem-solving is to ensure that your calculations are consistent with the accuracy justified by the data. If given data are generally taken to be exact, to how many significant figures are results generally displayed?