In order for work to be done, what three things are necessary?

Answers

Answer 1

Answer:

force, displacement & cause.

Explanation:

there must be a displacement and the force must cause the displacement.

i hope this helps you ahh


Related Questions

Hey guys <3
I need some help with this performance task,, physics isn’t my strongest subject so help is much appreciated :)

(8/9 parts)

Answers

Answer:

8/9 parts

Explanation:

mark me as brainliest

People who are exceptionally tall (like seven feet and over) often have a disorder that causes them to keep growing past the age most people do in their late teens. What gland would this disorder be associated with?
A.
adrenal
B.
thyroid
C.
pituitary
D.
pancreas

Answers

Answer:

C is the answer

Explanation:

The pituitary gland also known as the Master gland controls and regulates secretion of most hormones, when taller people usually grow past expected height this is normally due to the Pituitary gland not properly regulating and it secretes too many growth hormones causing "gigantism."

if a person with the arm dimensions shown pushes down hard with a 90 n force, what force must the triceps muscle provide? ignore the mass of the arm and hand in your calculation.

Answers

Answer:

1125 N

Explanation:

A 2300-kg car slows down at a rate of 3.0 m/s2 when approaching a stop sign. What is the magnitude of the net force causing it to slow down?

Answers

The magnitude of the net force causing the 2300kg car to slow down is 6900N

HOW TO CALCULATE FORCE:

The net force applied on a moving object can be calculated by multiplying the mass of the object by its acceleration. That is;

Force (N) = mass (kg) × acceleration (m/s²)

According to this question, a 2300-kg car slows down at a rate of 3.0 m/s2 when approaching a stop sign. The net force causing the car to stop can be calculated as follows:

F = 2300kg × 3m/s²

F = 6900N

Therefore, the magnitude of the net force causing the 2300kg car to slow down is 6900N.

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Ok, so the runner then goes from 20m to 11m. Distance? Displacement?

Answers

Answer:

honestly a bit confused by the question, but this would be a 9 meter difference in the distance, moving from 20m to 11m

Explanation:

Multiples of the fundamental frequency created by plucking a string very quickly, several times in a row is called__________.

a.
pitch
c.
scales
b.
overtones
d.
percussion

Answers

Answer:

overtones

Explanation:

NEED HELP!!!! 11 POINTS!!!!

Alonzo wants to be a computer programmer, and he spends a lot of time sitting in front of a screen. Physical agility will not be a big part of his job. Does he need to worry about building muscle strength?
A.
No, he will not have an active lifestyle.
B.
Yes, he never knows when he might want to change careers.
C.
Yes, he really needs to focus on it since his career is not active.
D.
No, since he does not need to be strong, there is not much point.

PLEASE NO LINKS

Answers

Answer:

c

Explanation:

,....,.....,...,...,....,.....,......

a car is running with the velocity of 72km/h. what will be its velocity after 5s if its acceleration is -2m/s2 ?​

Answers

Answer:

36 km / hr

Explanation:

velocity final = velocity initial + accel * time

                             20 m/s     + (-2)*5                ( 20 m/s = 72 km/hr)

                                10 m/s     ( or 36 km/hr)

If a plane travels 800 m south & 1500 m east, what is its distance &

displacement?

Answers

Answer:

2300 because 800 + 1500=2300

why does lowered air pressure allow water to boil at room temperature

Answers

Answer:

As ambient air pressure decreases, molecules evaporating from a boiling liquid meet less resistance from air molecules and enter the air more easily. Because the vapor pressure can be reduced, the temperature needed to boil the liquid is also reduced.

Explanation:

Answer:

Less force pushes down on the liquid, making it easier for gas to escape.

Explanation:

I hope this helps and have a great day!

An book fell from a shelf 1.5 meters from the ground. If it took the book 3 seconds to hit the ground, what was the velocity of the book?

Answers

The initial velocity of the book before its hits the ground is 14.2 m/s.

The given parameters;

height of the book above the ground, h = 1.5 mtime of motion of the book, t = 3 seconds

The initial velocity of the book is calculated as follows;

h = ut + ¹/₂gt²

where;

u is the velocity of the book

1.5 = 3u + (0.5 x 9.8 x 3²)

1.5 = 3u + 44.1

3u = 1.5 - 44.1

3u = -42.6

[tex]u = \frac{-42.6}{3} \\\\u = -14.2 \ m/s\\\\u = 14.2 \ m/s \ downwards[/tex]

Thus, the initial velocity of the book before its hits the ground is 14.2 m/s.

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Angelica has sprained her ankle and needs to stay off it for a few weeks, which is really frustrating because she is on the track team. She is worried that a prolonged period of inactivity will hurt her training. After about 10 days, she thinks that she can start working out gradually if she takes painkillers right before her workout. What is the BEST response to Angelica?

OPTIONS:

A.
She could really injure herself with this plan since she will not feel pain.
B.
Trying it once or twice and seeing how she feels is probably the best way to go.
C.
It is a common technique and lots of athletes practice injured so she will be fine.
D.
The damage from working out is probably less than the issue exercise will create.

PLEASE NO LINKS

Answers

Answer:

I think the answer is c

Explanation:

Because It is a common technique and lots of athletes practice injured so she will be fine.

By working on the given plan, Angelica can injure herself since she will not feel pain. The correct option is A.

What is ankle sprain?

A sprain takes place when your ankle is compelled to move out of its regular place, causing one or more of the ligaments in your ankle to stretch, partially tear, or completely tear.

A sprained ankle can be caused by a fall that causes your ankle to twist. Landing on your foot awkwardly after jumping or pivoting.

You should avoid strenuous exercises, such as running, until the pain and swelling have subsided, but you should keep moving so that the muscles and ankle do not stiffen. Once your ankle is less painful, begin some gentle exercises.

As she is having ankle sprain, and she is planning to take pain killers and start to work out, this can cause her even more problem as she will not feel any pain.

Thus, the correct option is A.

For more details regarding sprain, visit:

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What is final velocity

Answers

Answer:

Final velocity is the velocity which the body has at the end of the given time period.

If the activity of a source is 70 Bq after 2 years, and 35 Bq after 15 years. How long will be until the activity is 8.75 Bq?​

Answers

Answer:

The SI unit for activity is one decay per second and is given the name becquerel (Bq) in honor of the discoverer of radioactivity. That is, 1 Bq = 1 decay/s. Activity R is often expressed in other units, such as decays per minute or decays per year.

A person holds a bucket of weight 60N and climbs vertically the distance of 5m. What is the work done by gravity?

Answers

Answer:

300 J (Joules)

A Joule will measure "the amount of work done when a force of one newton is exerted through a distance of one meter"

Hope this Helps

Mete reading a cruise the sale and the bulb in the simple circuit above is the same explain what is the same and what is different in terms of energy

Answers

Answer:

:parallel

Explanation:

Potential difference is the difference in potential energy per charge between two different points in an electric circuit. Here is a simpler explanation:

which of the following objects has no net force acting upon it

Answers

Answer:

D and object with constant velocity

I NEED A 100% ACCURATE ANSWER FOR THIS QUESTION ASAP NO LINKS !!!

Answers

Answer:

The answer is static friction. This is the friction that involves objects that do not move.

Explanation:

Friction is a force which opposes the motion of one object moving relative to another. static friction and kinetic friction are the two type of friction.

Static friction is that type of friction which keeps an object at rest. Force must be applied greater than static friction to move an object. Therefore it is the static friction which helps the pile of rocks from falling apart.

(Brainiest and thanks appreciated)

Answer:

static friction

Explanation:

I did a test like this yesterday same question different object

how does a second class lever make our work easier​

Answers

Answer:

In a second class lever, the load is located between the effort and the fulcrum. If the load is closer to the fulcrum than the effort, then less effort will be required to move the load. If the load is closer to the effort than the fulcrum, then more effort will be required to move the load.

Explanation:

from what i learned, if its farther away from the load, its easier to lift, like a wheel barrel

What is downward force that acts on an airplane in flight

Answers

Answer:

重力

Explanation:

这是正确的答案还是不是

What is frequency measured in? What is the amplitude?

Answers

Answer:

The units of frequency are hertz. As 1 hertz is equal to one cycle per second.

Amplitude is the maximum displacement of the waves or the distance from rest to crest and is measured in meters or centimeters or millimeters.

How is the diametre of a spherical body measured? Explain​

Answers

Answer:

To measure diameter of a spherical body using Vernier Callipers.A small, movable auxiliary graduated scale attached parallel to a main graduated scale and calibrated to indicate fractional parts of the subdivisions of the larger scale.It is useful tool to measure spherical body.Diameter of a sphere=d = 2 * r , Surface area of a sphere: A = 4 * π * r² , Volume of a sphere: V = 4/3 * π * r³ , Surface to volume ratio of a sphere: A / V = 3 / r .

What is the equation for the force of a spring

Answers

Answer:

F=-kx

Explanation:

yan lang po ang alam ko

l am so confused is it right?

Answers

Answer:

D

Explanation:

First,mg>fv: It does a download acceleration,and the speed of the object increase.

Second,mg=fv: it hasn't a acceleration.

you can think the f is a constant.

What is the relationship between the temperature of a star and its luminosity?

Answers

The Luminosity of a star is proportional to its Effective Temperature to the 4th power and its Radius squared.

A steel projectile is shot horizontally at 54 m/s from the top of a 357 m tower. How far
from the base of the tower does the projectile hit the ground?

Answers

Hi there!

We can begin by solving for the time it takes the projectile to reach the ground.

Use the equation:

[tex]t = \sqrt{\frac{2h}{g}}[/tex]

Plug in the given height:

[tex]t = \sqrt{\frac{2(357)}{9.8}} = 8.536 s[/tex]

Use the equation:

d = vt, to solve for the horizontal distance:

d = (54)(8.536) = 460.944 m

A 1.35 kg block is pulled across a
flat, frictionless floor with a 3.07 N
force at 32.0° above horizontal.
What is the acceleration of the block?

Answers

Answer:

F=ma

3.07=1.35(a)

3.07/1.35 = a

a=2.27m/s^2

Explanation:

Since the question gives us both the force and mass of the object we can use the f= ma equation and just plug in both the force and mass and just solve for acceleration. I believe the degree listed in the question is just there to throw you off.

Henry is at the state fair. At one booth he throws a 0.70 kg ball forward with a velocity of 22.0 m/s in order to hit a 0.15 kg bottle sitting on a shelf. When the ball makes contact the bottle goes flying forward at 29.0 m/s. What is the velocity of the ball after it hits the bottle?

Answers

The velocity of the ball after it hits the bottle is 15.8 m/s

Let m₁ represent the mass of the ball, m₂ the mass of the bottle, u₁ the velocity of ball before impact, u₂ the velocity of bottle before impact, v₁ the velocity of ball after impact and v₂ the velocity of bottle after impact.

Given that:

m₁ = 0.7 kg, m₂ = 0.15 kg, u₁ = 22 m/s, u₂ = 0, v₂ = 29

momentum before impact = momentum after impact, hence:

m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂

0.7(22) + 0.15(0) = 0.7v₁ + 0.15(29)

0.7v₁ = 11.05

v₁ = 15.8 m/s

Therefore the velocity of the ball after it hits the bottle is 15.8 m/s

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Someone help me please I don’t even know if that’s physics or not I just need help

Answers

Answer:

1. the robber carrying the metal safe will hurt more because the metal safe is heavier, so the heavier will be the force on the opposite direction from the one he was running when he hit the wall

2. ???

Explanation:

1. 3rd newton law: "If two bodies exert forces on each other, these forces are equal in magnitude and opposite in direction"

2. I don't know

1. A sailboat accelerates uniformly from 3.0 m/s to 12.0 m/s at a rate of 1.5 m/s2. What distance does the boat travel?​

Answers

Answer:

45 m

Explanation:

Use the equations of motion.

We know that:

S= the unknown

U=3 m/s

V=12 m/s

A=1.5 m/s

T= we won't need it

The equation used: [tex]v^2=u^2+2as[/tex]

Subsitute the values: [tex]12^2=3^2+2*1.5*s\\[/tex]

Solve the equation:

[tex]144=9+3s[/tex]

[tex]135=3s[/tex]

[tex]s=45 m[/tex]

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