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podryga [215]
4 years ago
5

What real-world examples show no work begin done? Can you think of examples other than resisting the force of gravity?

Physics
2 answers:
natka813 [3]4 years ago
7 0

Answer:

Explanation:

The work done is defined as the product of force in the direction of displacement and the displacement.

Work done = force x displacement x Cos Ф

Where, Ф be the angle between force and the displacement vectors.

Work may be positive, negative or zero depending on the values of angle Ф.

The work done is zero when force is zero or displacement is zero or angle Ф is 90 degree.

So, when we apply a force on a body and body does not displace, then the work done is zero.

irga5000 [103]4 years ago
6 0
Oh my gosh !  Resisting the force of gravity always DOES involve doing work.
If no work is being done, then you're NOT resisting the force of gravity.

Example:

-- ball rolling on the floor . . . no work
-- ball rolling up a ramp . . . work being done
-- ball rolling down a ramp . . . work being done, BY gravity

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Explain how Newton's third law is applied when a rocket ship is being launched?
garri49 [273]

Newton's Third Law states that "every action has an equal and opposite reaction". In a rocket, burning fuel creates a push on the front of the rocket pushing it forward. This creates an equal and opposite push on the exhaust gas backwards.

6 0
3 years ago
5. A bus starting from rest accelerates in a straight line at a constant rate of 3m/s2 for 8s. Calculate the distance travelled
mojhsa [17]

Answer:

d = 96 meters

Explanation:

a = acceleration

t = time

d = distance

d =  \frac{1}{2}  \times a \times  {t}^{2}

d =  \frac{1}{2}  \times 3 \times  {8}^{2}

d = 96

8 0
3 years ago
Consider a horse pulling a buggy. Is the
Degger [83]

Yes, it's true.

But 2nd Newton Law always come to play when the horse is to move forward because obviously the forces interact antagonistically and mass has to be accounted for.

That's what I think. Hope it's right, all the best.

8 0
3 years ago
Which of these components is present in this circuit schematic?
Svetlanka [38]
Its resistor :}...............

4 0
3 years ago
Read 2 more answers
What allows the bimetallic coil to turn on or off a heating or cooling system? The two metals contract the same amount. The ther
Vedmedyk [2.9K]

Answer:

The two metals expand differently.

Explanation:

The bimetallic strip has two metal strips positioned like a bridge, these strips connect the electrical circuit to the heating system. When these strips are linear or "down" they allow the electricity to move through the circuit to the heating system to turn the heat on. When the strips are "up" the disconnect the electricity flow, thus turning the heating system off, thus the room becomes cool/cold.

3 0
3 years ago
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