General Pri Class Wor Class Work \# 1 1-4. Determine the of (a) \( 20 \mathrm{mN} \), (b) \( 150 \mathrm{kN} \), (c) \( 60 \mathrm{MN} \). Express the answer to three significant figures *1-8. Represent each of the following quantitiesin the correct SI form using an appropriate prefix: (a) \( 0.000431 \mathrm{~kg} \), (b) \( 35.3\left(10^{3}\right) \mathrm{N} \), (c) \( 0.00532 \mathrm{~km} \). (b) \( 35 .(10) \mathrm{N},(\mathrm{c}) .0035 \mathrm{k} \) "1-16. Evaluate each of the following to three significant figures and express aech answer in \( \mathrm{SI} \) units using an appropriate prefix: (a) \( (212 \mathrm{mN})^{2} \), (b) \( (52800 \mathrm{~ms})^{2} \), 1-21. If a man weighs 690 newtons on earth, specify (a) his mass in kilograms. If the man is on the moon, where the acceleration due to gravity is \( g_{m}=1.61 \mathrm{~m} / \mathrm{s}^{2} \), determ (b) his weight in newtons, and (c) his mass in kilograms.
Added by Maryam S.
Close
Step 1
What is it that we need to solve or understand? Once we have a clear understanding of the problem, let's gather all the relevant information or data that we have. This could include any facts, figures, or background information that might be helpful in finding a Show more…
Show all steps
Your feedback will help us improve your experience
Prem Bijarniya and 74 other Physics 103 educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
The non-SI unit of mass called the (international avoirdupois) pound has value $1 \mathrm{lb}=0.45359237 \mathrm{~kg}$. The 'weight' of the mass in the presence of gravity is called the pound-force, Ibf. Assuming that the acceleration of gravity is $g=9.80665 \mathrm{~m} \mathrm{~s}^{-2}$, (i) express $1 \mathrm{lbf}$ in SI units, (ii) express, in SI units, the pressure that is denoted (in some parts of the world) by $\mathrm{psi}=1 \mathrm{lbf} \mathrm{in}^{-2}$, (iii) calculate the work done (in SI units) in moving a body of mass $200 \mathrm{lb}$ through distance $5 \mathrm{yd}$ against the force of gravity.
The Force Exerted on the Moon In FIGURE $5-37$ we show the Earth, Moon, and Sun (not to scale) in their relative positions at the time when the Moon is in its third-quarter phase. Though few people realize it, the force exerted on the Moon by the Sun is actually greater than the force exerted on the Moon by the Earth. In fact, the force exerted on the Moon by the Sun has a magnitude of $F_{\mathrm{sM}}=4.34 \times 10^{20} \mathrm{N},$ whereas the force exerted by the Earth has a magnitude of only $F_{\mathrm{EM}}=1.98 \times 10^{20} \mathrm{N}$ . These forces are indicated to scale in Figure $5-37 .$ Find (a) the direction and (b) the magnitude of the net force acting on the Moon. (c) Given that the mass of the Moon is $M_{M}=7.35 \times 10^{22} \mathrm{kg}$ , find the magnitude of its acceleration at the time of the third- quarter phase.
Find the weight on the surface of the Earth of a body whose mass is (a) $3.00 \mathrm{~kg}$, and (b) $200 \mathrm{~g}$. The general relation between mass $m$ and weight $F_{W}$ is $F_{W}=m g$. In this relation, $m$ must be in kilograms, $g$ in meters per second squared, and $F_{W}$ in newtons. On Earth, $g=9.81 \mathrm{~m} / \mathrm{s} 2$. The acceleration due to gravity varies from place to place in the universe. (a) $F_{W}=(3.00 \mathrm{~kg})\left(9.81 \mathrm{~m} / \mathrm{s}^{2}\right)=29.4 \mathrm{~kg} \cdot \mathrm{m} / \mathrm{s}^{2}=29.4 \mathrm{~N}$ (b) $F_{W}=(0.200 \mathrm{~kg})\left(9.81 \mathrm{~m} / \mathrm{s}^{2}\right)=1.96 \mathrm{~N}$
Recommended Textbooks
University Physics with Modern Physics
Physics: Principles with Applications
Fundamentals of Physics
Watch the video solution with this free unlock.
EMAIL
PASSWORD