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Airida [17]
3 years ago
12

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

Physics
2 answers:
Taya2010 [7]3 years ago
8 0
You will need work ethic, self control, and a good mindset
Misha Larkins [42]3 years ago
5 0
Perseverance, good mind set, and work ethic
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Can someone Plzzz help meee.
mario62 [17]

solid...............

6 0
3 years ago
Which describes a train’s acceleration if it changes speed from 25 m/s to 10 m/s in 240 s? positive acceleration no acceleration
OLEGan [10]

To understand acceleration, you need to know speed and velocity.

Why?

Acceleration is the change in velocity, and the velocity equation is:

velocity = distance / time     Units: (m/s)

If a change in position means an object has a velocity, then that means that a change in velocity has an acceleration (I recommend you look at the graphs, it will help a lot to understand the relationship between each).

Now that we have some background, lets use it to answer the problem!

The change in velocity is from 25 m/s to 10 m/s, and we have a time. Lets plug it into the (average) acceleration equation so we can visualize it better!

The symbol delta means "change" : Δ

a = Δv / Δt

expanded to:

a = vf - vi / tf - ti  

(vf = velocity final, vi = velocity initial, tf = time final, ti = time initial)

So if the train's speed went from 25 m/s to 10 m/s, then that means that 10 m/s is our final velocity and 25 m/s is the initial:

a = 10 - 25 / 240

a = -15 / 240

a = -0.0625 m/s^2

Since we ended up with a negative number, it means that the train has a negative acceleration!!!!!

The fast way to do this:

25 m/s is bigger than 10 m/s, so that means that to go from 25 m/s to 10 m/s you have to slow down--otherwise known as putting on your brakes. So if the change in speed is negative then the acceleration will be negative.

In other words, if your final speed is less than your initial speed then your acceleration would be negative.

Sorry for the long explanation! I hope you never struggle with this again though!

Hope it helped,

3 0
3 years ago
En un barrio un estudiante observa un roedor en medio de dos postes, los cuales están comunicados por un solo cable de fibra ópt
castortr0y [4]

Answer:

7 Newton

Explanation:

Dado

Longitud de la cuerda = 50 m

El cable se dobla en 0,058 m.

Masa de roedor = 350 gramos = 0,35 kg

T = m * a + m × v2 / r

Sustituyendo los valores dados obtenemos

T = 0,35 (10 + 10)

T = 0,35 * 20

T = 7 Newton

4 0
3 years ago
Which of the following is not a part of the appendicular skeleton
Bingel [31]

Answer:

Hyoid

Explanation:

The hyoid is located in the neck area, not the limbs.

7 0
3 years ago
If a reaction is exothermic, then which of the following statements is always true? If a reaction is exothermic, then which of t
sesenic [268]

Explanation:

Reactants ⇒ product + heat (exothermic reaction) ....(1)

We have given that the reaction is exothermic, so the heat is rejected from the reaction. We know that heat is the form of energy.

From equation (1)

from the given equation we can see that reactants have more energy than products.

So the reactants have higher potential energy in comparison to the products.

7 0
3 years ago
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