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alukav5142 [94]
3 years ago
11

What is Newton's Law

Physics
1 answer:
r-ruslan [8.4K]3 years ago
5 0
I hope you are referring to Newton's Laws of Motion by "Newton's Law".

There are three laws quoted by the great physicist of all time Sir Isaac Newton.

These laws are the building-blocks of the field of the Physics known as Classical Physics or Classical Mechanics.

Law 1. If no force applied externally, then a body in rest will always be in rest and a body in motion will continue to move in a straight line with a uniform velocity.

Law 2. The rate of change of momentum is directly proportional to the force applied and the direction of motion is always in the direction of the force applied.

Law 3. Every action has an equal and opposite reaction.

The Law 1 is also called the law of Inertia.

From the 2nd law, we can derive the equation of force, that is F =m.a (m = mass; a = acceleration)
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A active-satellite, one that sends out electromagnetic waves, can be the energy down toward the ocean surface and determine how
Anna71 [15]

Answer: This is called backscatter which refers to the ability of big waves to reflect the energy in order to give back the signal .

Explanation:

What is meant by backscatter?

Backscatter is the process where by the waves or signal is reflected back to the original direction and get scattered in all directions.

Backscatter allows us to receive signal and be able to view all the channels that are connected through the satellite.

4 0
3 years ago
Can someone give me an example or explanation of calculating energy from voltage? Many thanks!
antoniya [11.8K]
Expression to calculate energy from voltage: E= V*Q where E= energy, V= voltage, and Q= charge

Additional help:
-To find the Voltage ( V )
[ V = I x R ] V (volts) = I (amps) x R (Ω)

-To find the Current ( I )
[ I = V ÷ R ] I (amps) = V (volts) ÷ R (Ω)

-To find the Resistance ( R )
[ R = V ÷ I ] R (Ω) = V (volts) ÷ I (amps)

I hope that helps to some extent-
7 0
2 years ago
If two opposing forces are equal, then the net force is 0 N.<br><br> true or false?
Fofino [41]

Answer:

false

Explanation:

6 0
2 years ago
2. As a pendulum swings, its energy is constantly converted between kinetic
Alex

Answer:

at point F

Explanation:

To know the point in which the pendulum has the greatest potential energy you can assume that the zero reference of the gravitational energy (it is mandatory to define it) is at the bottom of the pendulum.

Then, when the pendulum reaches it maximum height in its motion the gravitational potential energy is

U = mgh

m: mass of the pendulum

g: gravitational constant

The greatest value is obtained when the pendulum reaches y=h

Furthermore, at this point the pendulum stops to come back in ts motion and then the speed is zero, and so, the kinetic energy (K=1/mv^2=0).

A) answer, at point F

6 0
3 years ago
A cylindrical specimen of some metal alloy 11.2 mm (0.4409 in.) in diameter is stressed elastically in tension. A force of 14100
MrRissso [65]

Answer:

μ = 0.436

Explanation:

Given:

Change in diameter, ΔD = 7 × 10⁻³ mm

Original diameter, D = 11.2 mm = 11.2 × 10⁻³ m

Applied force, P = 14100 N

Cross-section area of the specimen, A = \frac{\pi}{4}D^2 =  \frac{\pi}{4}(11.2\times 10^{-3})^2

Now,

elongation due to tensile force is given as:

\delta = \frac{PL}{AE}

or

\frac{\delta}{L} = \frac{P}{AE}

on substituting the values, we get

\frac{\delta}{L} = \frac{14100}{\frac{\pi}{4}(11.2\times 10^{-3})^2\times100\times 10^9}

or

\frac{\delta}{L} = 0.00143=\epsilon_x

where,

\epsilon_x is the strain in the direction of force

Now,

\epsilon_z=\frac{\Delta D}{D}=\frac{7\times 10^{-3}}{11.2}=0.000625

now, the poisson ratio, μ is given as:

\mu=\frac{\epsilon_z}{\epsilon_x}

on substituting the values we get,

\mu=\frac{0.000625}{0.00143}=0.436

7 0
3 years ago
Read 2 more answers
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