1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Svetach [21]
2 years ago
7

I'm studying the equilibrium of forces so hard that I got confused for a sec. Is the force due to gravity included in summing up

moments about a point? Or external forces are only considered in the summation of moments? Thanks!
Physics
1 answer:
jenyasd209 [6]2 years ago
3 0

Answer:

Yes, you would consider the mass × gravity at the centre of gravity of the object in question to cause a moment, hence it should be included in your resolution

You might be interested in
How much extra water does a 147-lb concrete canoe displace compared to an ultralightweight 38-lb kevlar canoe of the same size c
romanna [79]

We use the formula, to calculate the volume of water displaced by concrete canoe,

V =\frac{W}{\gamma }

Here, W is the weight of concrete canoe and \gamma is the specific weight of water and its value is 62.4\ lb/ft^3.

So,

V =\frac{ 147\ lb}{62.4\ lb/ft^3}=2.356\ ft^3.

Now the volume of water occupied in ultra lightweight kevlar canoe,

v=\frac{w}{\gamma}

Here, w is weight of  kevlar canoe.

So,

v=\frac{38\ lb}{62.4\ lb/ft^3} =0.6089\ ft^3

Thus, the volume of water displaced,

=V-v=2.356\ ft^3-0.6089\ ft^3=2.19\ ft^3.

Hence, the volume of water displaced canoe compared to an ultra-lightweight  kevlar canoe is 2.19\ ft^3

5 0
2 years ago
Which action can be explained by physics ?
LiRa [457]
The pressure of blood exerted on the inner walls of the veins

8 0
3 years ago
Read 2 more answers
A scuba diver's tank contains 0.240 kg of o2 compressed into a volume of 3.10 l. what volume (in liters) would this oxygen occup
ohaa [14]
Given:
m = 0.240 kg = 240 g, the mass of O₂
V = 3.10 L = 3.10 x 10⁻³ m³, the volume

Because the molar mass of oxygen is 16, the number of moles of O₂ is
n = (240 g)/(2*16 g/mol) =  7.5 mol

As an ideal gas,
p*V = nRT
or
V = (nRT)/p
where R = 8.314 J/(mol-K)

When
p = 0.910 atm = (0.910 atm) * (101325Pa/atm) = 92205.75 Pa
T = 27 °C = (27 + 273) K = 300 K
then the volume is
V= \frac{(7.5 \, mol)*(8.314 \, J/(mol-K))*(300 \, K)}{(92205.75 \, Pa)} =0.2029 \, m^{3}

V = (0.2029 m³)*(10³ L/m³) = 202.9 L

Answer: 203 liters
3 0
3 years ago
The low-pressure area near Earth’s equator is filled by cool air moving in from ________. Btw this is science
bonufazy [111]

Answer:

the north and south pole

Explanation:

this should be the correct answer

5 0
2 years ago
A particle is moving along the x-axis. Its position as a function of time is given as x=bt-ct^2a) What must be the units of the
lisabon 2012 [21]

Answer:

We are given x= bt +ct²

So

A. bxt= m

Because m/s*s= m

So b= m/s and c= m/s²

B.

x= bt-ct²

So at x=0 t=0

x=0 t= 2

We have

bt = ct² so t = b/c at x= 0

So b-2ct= 0

B. To find velocity we use

dx / dt = b - 2 Ct

C. At rest wen V= 0

We have t= b/2c

D. To find acceleration we use

dv / dt = - 2C

3 0
3 years ago
Other questions:
  • Two identical, thin rods, each with mass m and length L, are joined at right angles to form an L-shaped object. This object is b
    7·2 answers
  • A roller coaster track is a good example of the law of conservation of energy. Use this law to explain these facts about a rolle
    12·2 answers
  • Tara heated a beaker on a hot plate. Then, she set the solution on the countertop to cool. Her lab partner, Molly, did not reali
    14·1 answer
  • A passenger jet flying at cruising altitude is often traveling in the upper troposphere at approximately 725 km per hour (or 450
    11·1 answer
  • Drag the item from the item bank to its corresponding match.
    13·2 answers
  • Graphs are ____ of relationships.
    9·1 answer
  • Which of the following types of lithospheric crusts collide to produce large mountains such as the Himalayan mountains?
    8·1 answer
  • Microwave ovens have a plate that rotates at a rate of about 7.0 rev/min. What is this in revolutions per second?
    6·1 answer
  • A boy climbs 12.0m up an apple tree. He picks an apple and throws it horizontally with a velocity of 3.0 m/s. How far forward do
    13·1 answer
  • 5. a new type of hoverboard has been designed to levitate over a copper surface. the
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!