1-7. A rocket has a mass of 250(10) slugs on earth. Specify (a) its mass in SI units and (b) its weight in SI units. If the rocket is on the moon, where the acceleration due to gravity is g„ = figures (c) its weight in SI units and (d) its mass in SI units. 5.30 ft/s, determine to three significant %3D
1-7. A rocket has a mass of 250(10) slugs on earth. Specify (a) its mass in SI units and (b) its weight in SI units. If the rocket is on the moon, where the acceleration due to gravity is g„ = figures (c) its weight in SI units and (d) its mass in SI units. 5.30 ft/s, determine to three significant %3D
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:1-7. A rocket has a mass of 250(10³) slugs on earth.
Specify (a) its mass in SI units and (b) its weight in SI units.
If the rocket is on the moon, where the acceleration due to
gravity is gm = 5.30 ft/s², determine to three significant
figures (c) its weight in SI units and (d) its mass in SI units.
%3D
*1-8. If a car is traveling at 55 mi/h, determine its speed in
kilometers per hour and meters per second.
1-9. The pascal (Pa) is actually a very small unit of
pressure. To show this, convert 1 Pa = 1 N/m² to lb/ft².
Atmospheric pressure at sea level is 14.7 lb/in². How many
pascals is this?
1-10. What is the weight in newtons of an object that has a
mass of: (a) 10 kg, (b) 0.5 g, and (c) 4.50 Mg? Express the
result to three significant figures. Use an appropriate prefix.
1-11. Evaluate each of the following to three significant
figures and express each answer in Sl units using
an appropriate prefix: (a) 354 mg(45 km)/(0.0356 kN),
(b) (0.004 53 Mg)(201 ms), and (c) 435 MN/23.2 mm.

Transcribed Image Text:1-1. Round off the following numbers to three significant 1-12. The specific weight (wt./vol.) of brass is 520 lb/ft’.
figures: (a) 4.65735 m, (b) 55.578 s, (c) 4555 N, and
(d) 2768 kg.
Determine its density (mass/vol.) in SI units. Use an
appropriate prefix.
1-2. Represent each of the following combinations of units
in the correct SI form using an appropriate prefix: (a) µMN,
(b) N/µm, (c) MN/ks², and (d) kN/ms.
1-13. Convert each of the following to three significant
figures: (a) 20 lb ft to N•m, (b) 450 lb/ft to kN/m², and
(c) 15 ft/h to mm/s.
1-3. Represent each of the following quantities in the
correct SI form using an appropriate prefix: (a) 0.000431 kg,
(b) 35.3(10) N, and (c) 0.00532 km.
1-14. The density (mass/volume) of aluminum is
5.26 slug/ft. Determine its density in SI units. Use an
appropriate prefix.
*1-4. Represent each of the following combinations of
units in the correct SI form: (a) Mg/ms, (b) N/mm, and
(c) mN/(kg us).
1-5. Represent each of the following combinations of *1-16. Two particles have a mass of 8 kg and 12 kg,
units in the correct SI form using an appropriate prefix:
(a) kN/us, (b) Mg/mN, and (c) MN/(kg · ms).
1-15. Water has a density of 1.94 slug/ft. What is the
density expressed in SI units? Express the answer to three
significant figures.
respectively. If they are 800 mm apart, determine the force
of gravity acting between them. Compare this result with
the weight of each particle.
1-6. Represent each of the following to three significant
figures and express each answer in SI units using an
appropriate prefix: (a) 45 320 kN, (b) 568(10°) mm, and (c)
0.005 63 mg.
1-17. Determine the mass in kilograms of an object that
has a weight of (a) 20 mN, (b) 150 kN, and (c) 60 MN.
Express the answer to three significant figures.
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