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pantera1 [17]
3 years ago
9

What is newtons first law​

Physics
2 answers:
miss Akunina [59]3 years ago
8 0

Explanation:

<h2>Newton's first law of motion states that everybody continues in its state of rest or of uniform motion in a straight line unless an external force is applied on it. </h2>
makkiz [27]3 years ago
4 0

Answer:

states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. It may be seen as a statement about inertia, that objects will remain in their state of motion unless a force acts to change the motion

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The temperature of a plastic cube is monitored while the cube is pushed 3.4 m across a floor at constant speed by a horizontal f
Nesterboy [21]

Answer:

\Delta E_{floor} = 51 J

Explanation:

The work (W) done on the cube to be pushed across the floor is equal to the total thermal energy (ΔE) of the system:        

W = \Delta E_{T} = \Delta E_{cube} + \Delta E_{floor} (1)

Also, the work done on the cube by the horizontal force is giving by:

W = F \cdot d (2)  

<em>where F: force applied to the cube , d: displacement of the cube     </em>    

<em>By equaling the equations (1) and (2)</em>, we can find the thermal energy of the floor:  

\Delta E_{cube} + \Delta E_{floor} = F \cdot d

\Delta E_{floor} = F \cdot d - \Delta E_{cube}

\Delta E_{floor} = 20 N \cdot 3.4 m - 17 J  

\Delta E_{floor} = 51 J

 

So, the increase in the thermal energy of the floor is 51 J.  

Have a nice day!    

7 0
3 years ago
Is it possible to stand backwards on a flight of stairs?
Pachacha [2.7K]

Answer:

yes

Explanation:

if your destination is on the top floor, but you are facing towards the bottom floor, you are facing the wrong way. It's all relative. Honestly, I hate this question, because then it turns into, is it possible to go backwards anywhere. Backwards and forwards, right and left, it's all relative to which way you are facing and where you want to go. If something is on the left and you turn 180 degrees, then that thing is on the right. If you are going forward towards your house and you turn around, you are now going backwards, relative to your house. But if your perspective is relative to that tree in the opposite direction of your house, you are now facing the right way. See, it's all relative to where you are going.

7 0
3 years ago
A jar is completely filled with water, and then it is sealed with a lid. If you push down on the lid with a pressure of 1000 Pa,
notsponge [240]

Answer:

The water pressure at the bottom of the jar will increase by 1000 Pa.

Explanation:

The Pascal principle states that:

In a fluid, a change in pressure at any point in the fluid is transmitted equally throughout the fluid, as it is occuring everywhere.

If we apply this principle at the case mentioned in the problem, we can say that:

- An initial pressure of 1000 Pa is applied on the top of the fluid (the water)

- According to Pascal's law, this pressure is transmitted with equal intensity (1000 Pa) to every point of the fluid

- So, the water pressure at the bottom of the jar will also increase by the same amount, 1000 Pa

5 0
3 years ago
Imagine you could travel to the moon where the acceleration due to gravity is 1.6 m/s^2. What would be the period of
VladimirAG [237]

Answer:

4.9612 s

Explanation:

Applying,

T = 2π√(L/g)............... Equation 1

Where T = period of the pendulum, L = Lenght of the pendulum, g = acceleration due to gravity of the moon, π = pie.

From the question,

Given: L = 1 m, g = 1.6 m/s²

Constant: π = 3.14

Substitute these values into equation 1

T = 2×3.14×√(1/1.6)

T = 6.28√(0.625)

T = 6.28×0.79

T = 4.9612 s

6 0
3 years ago
If the sign of work is negative,
aivan3 [116]

If the sign of work is negative, that means the force and the motion are in opposite directions.

Let's say you see something roll off of the shelf. You catch it, and you let it down slowly and gently.

Gravity exerted down-force on it and it moved down. Gravity did positive work on it.

YOU exerted UP-force on it and it moved down. YOU did negative work on it.

(Also, the falling object exerted down-force on your hand, and your hand moved down. The falling object did positive work on your hand ! Where did THAT energy come from ? It came from the potential energy that the object had while it was on the shelf. Your hand absorbed that energy on the way down, doing negative work. So the object didn't have any kinetic energy when it reached the floor, and it did NOT splinter the floor or shatter in smithereens. It had barely enough energy left to make a sound when it hit the floor.)

5 0
3 years ago
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