EBK ENGINEERING MECHANICS STATICS
15th Edition
ISBN: 9780135187777
Author: HIBBELER
Publisher: PEARSON
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Chapter 1.6, Problem 20P
If the man is on the moon, where the acceleration due to gravity is gm = 5.30ft/s2, determine (d) his weight in pounds, and (e) his mass in kilograms.
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1. For the 3500-lb car, determine (a) its mass in slugs, (b) its
weight in newtons, and (c) its mass in kg. slug = lb-/ft
A person weighs 30 lb on the moon, where g = 32 ft/s2.Determine (a) the mass of the person; and (b) the weight of the person on earth.
Convert the following: (a) 400 lb ft to kN • m; (b) 6 m/s to mi/h;(c) 20 lb/in.2 to kPa; and (d) 500 slug/in. to kg/m.
The kinetic energy of a car of mass, m moving with velocity v is E = mv2/2. If m = 1000 kg and v = 6 m/s, compute E in (a) kN · m; and (b) lb ft.
A differential equation is d^2/dt^2=Ay^2=byt where y represents a distance and 1 is time. Determine the dimensions of constants A and B for which the equation will be dimensionally homogeneous.
Calculate the gravitational force between the earth and the moon in newtons. The distance between the earth and the moon is 384 x 103
Note: mass of earth = 5.9742 X 1024 kg, radius of earth = 6378 km, mass of moon = 0.073 483 x 1024 kg, radius of moon = 1737 km.
A man is standing on a board on a frozen lake where there is no friction between the board and the ice surface. Tha man's mass is 2 m and the boaf's mass is 4 m. The board has length L. He walks from 1/5 Lfrom the left end of the board to 1/5 L from the right end of the board. How far and in which direction does the board move during this process?
Chapter 1 Solutions
EBK ENGINEERING MECHANICS STATICS
Ch. 1.6 - What is the weight in newtons of an object that...Ch. 1.6 - Represent each of the following combinations of...Ch. 1.6 - Represent each of the following combinations of...Ch. 1.6 - (b) 350 lb/ft3 to kN/m3, (c) 8 ft/h to mm/s....Ch. 1.6 - Represent each of the following as a number...Ch. 1.6 - Round off the following numbers to three...Ch. 1.6 - Represent each of the following quantities in the...Ch. 1.6 - Represent each of the following combinations of...Ch. 1.6 - Represent each of the following combinations of...Ch. 1.6 - Represent each of the following combinations of...
Ch. 1.6 - Represent each of the following with SI units...Ch. 1.6 - Evaluate each of the following to three...Ch. 1.6 - Determine its density in SI units. Use an...Ch. 1.6 - (212 mN)2, (52 800 ms)2, and [548(105)]1/2 ms.Ch. 1.6 - is a dimensionality homogeneous equation which...Ch. 1.6 - To show this, convert 1 Pa = 1 N/m2 to lb/ft2....Ch. 1.6 - What is the density expressed in SI units? Express...Ch. 1.6 - Evaluate each of the following to three...Ch. 1.6 - If the density (mass/Volume) of concrete is 2.45...Ch. 1.6 - If the man is on the moon, where the acceleration...Ch. 1.6 - If they are 800 mm apart, determine the force of...
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- Five objects in a region where the acceleration due to gravity is 30.2 ft/s2 are as follows: x1 = 350 g of mass; x2 weighs 950gf; x3 weighs 25 poundals; x4 weighs 2lbf; x5 is 0.40 slug of mass. What is (a) the total mass expressed in gm, and (b) the total weight expressed in kgf.arrow_forwardA poundal is the force required to accelerate a mass of 1 Ibm at a rate of 1 ft/s2, and a slug is the mass of an object that will accelerate at a rate of 1 ft/s2 when subjected to a force of 1 bf. Calculate the mass in slugs and the weight in poundals of a 175 Ibm man (i) on earth and (ii) on the moon, where the acceleration due to gravity is one-sixth of its value on earth.arrow_forward2. The large piston in a hydraulic lift has a radius of 250 cm2 . What force (kgf) must be applied to the small piston with a radius of 25 cm2 in order to raise a car of mass 1500 kg? а cararrow_forward
- What is the weight of a 45-kg boulder if it is brought to a place where the acceleration due to gravity is 395 m/s per minute?arrow_forwardDetermine the weight in newton’s of a car whose mass is 1400 kg. Convert the mass of the car to slugs and then determine its weight in pounds.arrow_forwardA tank containing oil has a diameter of 10 ft and a height of 5 ft. (a) If the oil has a specific gravity of 0.85,determine (a) its weight in pounds and in newtons at a location where the acceleration due to gravity is 31 ft/s2. (b) Calculate the its mass , in slugs. (c) If this oil is located on the moon’s surface where the acceleration due to gravity is approximately 5.332 ft/s2, determine the weight of oil.arrow_forward
- Determine the weight in newton’s of a car whose mass is 1400 kg. Convert the mass of the car to slugs and then determine its weight in pounds.arrow_forwardA body weighing 558 kg accelerates from 55 ft/s to 146 ft/s. Calculate the change in kinetic energy of the object.arrow_forwardDetermine the mass of air in slugs contained in a room whose dimensions are 15 ft x 20ft x 20ft. Assume the density of air is 0.0724 lb/ft3.arrow_forward
- A crane is lifting a system with a constant speed. The weight of each object is shown. Neglect the mass of the cables. Note that K stands for Kipps [1K = 1,000lbs] and is a unit of force. Do NOT convert or multiply by g. cable 1 How many forces are acting on the ring? 4. ring (2K) 6 How many forces are acting on the spreader bar? cable 2 cable 3 How many forces are acting on the load? 3. 45° 45° Are the forces on the system balanced? yes v spreader bar (20K) cable 4 cable 5 How much tension in is cable 1? K How much tension in is cable 2? K load (48K) BARNHART K How much tension in is cable 3? K How much tension in is cable 4? K How much tension in is cable 5? check answers'arrow_forwardA passenger is standing on a scale in an elevator. The building has a height of 500 feet, the passenger has a mass of 80 kg, and the scale has a mass of 7 kg. The scale sits on the floor of the elevator. (It is an Otis elevator, so we will label it as "O" so as not to confuse its forces with those caused by the earth.) You may take g = 10 N/kg. For doing this problem it might be useful to start by drawing free-body diagrams for the passenger and the scale.Consider the vertical forces acting on the passenger and the scale WE→P: The force of the earth pulling down on the passenger (weight). WE→S: The force of the earth pulling down on the scale (weight). NP→S: The force of the passenger pushing down on the scale (normal). NS→P: The force of the scale pushing up on the passenger (normal). NO→S: The force of the elevator pushing up on the scale (normal). NO→P: The force of the elevator pushing up on the passenger (normal) a) While it is accelerating downward, which of the forces in your…arrow_forwardA body weighs 250 lb at the earth's surface. Determineb. The weight of the body 500 mi above the earth's surface.arrow_forward
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