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1โ1. Round off the following numbers to three significant figures: (a) 4.65735 m, (b) 55.578 s, (c) 4555 N, and (d) 2768 kg.
1โ2. Represent each of the following combinations of units in the correct SI form using an appropriate prefix: (a) , (b) N>mm, (c) MN>ks^2 , and (d) kN>ms.
mMN
1โ3. Represent each of the following quantities in the correct SI form using an appropriate prefix: (a) 0.000431 kg, (b) 35.3(10 3 ) N, and (c) 0.00532 km.
- 1โ4. Represent each of the following combinations of units in the correct SI form: (a) , (b) , and
(c) mN>(kg #^ ms).
Mg>ms N>mm
ยฉ 2010 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. This material is protected under all copyright laws as they currently exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
ยฉ 2010 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. This material is protected under all copyright laws as they currently exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
1โ5. Represent each of the following combinations of units in the correct SI form using an appropriate prefix:
(a) kN>ms, (b) Mg>mN, and (c) MN>(kg #^ ms).
1โ7. A rocket has a mass of 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 , determine to three significant figures (c) its weight in SI units and (d) its mass in SI units.
gm = 5.30 ft>s^2
- 1โ8. If a car is traveling at , determine its speed in kilometers per hour and meters per second.
55 mi>h
1โ6. 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) , and (c) 0.005 63 mg.
568(10 5 ) mm
FPO
FPO
ยฉ 2010 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. This material is protected under all copyright laws as they currently exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
1โ13. Convert each of the following to three significant figures: (a) to , (b) to , and (c) 15 ft h to mm s.> >
20 lb #^ ft N #^ m 450 lb>ft^3 kN>m^3
1โ14. The density (mass volume) of aluminum is
. Determine its density in SI units. Use an appropriate prefix.
5.26 slug>ft^3
1โ15. Water has a density of. What is the density expressed in SI units? Express the answer to three significant figures.
1.94 slug>ft^3
- 1โ16. Two particles have a mass of 8 kg and 12 kg, respectively. If they are 800 mm apart, determine the force of gravity acting between them. Compare this result with the weight of each particle.
ยฉ 2010 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. This material is protected under all copyright laws as they currently exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
1โ17. 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.
1โ18. Evaluate each of the following to three significant figures and express each answer in SI units using an appropriate prefix: (a) , (b) , and (c) (400 m)^3.
(200 kN)^2 (0.005 mm)^2
1โ19. Using the base units of the SI system, show that Eq. 1โ2 is a dimensionally homogeneous equation which gives F in newtons. Determine to three significant figures the gravitational force acting between two spheres that are touching each other. The mass of each sphere is 200 kg and the radius is 300 mm.
