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alukav5142 [94]
4 years ago
11

What is Newton's Law

Physics
1 answer:
r-ruslan [8.4K]4 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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Two boxers are fighting. Boxer 1 throws his 5 kg fist at boxer 2 with a speed of 9 m/s.
Sladkaya [172]

Answer:

0.001 s

Explanation:

The force applied on an object is equal to the rate of change of momentum of the object:

F=\frac{\Delta p}{\Delta t}

where

F is the force applied

\Delta p is the change in momentum

\Delta t is the time interval

The change in momentum can be written as

\Delta p=m(v-u)

where

m is the mass

v is the final velocity

u is the initial velocity

So the original equation can be written as

F=\frac{m(v-u)}{\Delta t}

In this problem:

m = 5 kg is the mass of the fist

u = 9 m/s is the initial velocity

v = 0 is the final velocity

F = -45,000 N is the force applied (negative because its direction is opposite to the motion)

Therefore, we can re-arrange the equation to solve for the time:

\Delta t=\frac{m(v-u)}{F}=\frac{(5)(0-9)}{-45,000}=0.001 s

4 0
3 years ago
All the colors of the rainbow are hiding where?
Charra [1.4K]

They're not hiding anywhere. They're all right there in the light that's shining into the mist.

It's just that when ALL the colors shine into your eye at the same time, your brain says "white".

I have a question: By any chance, do you have a sister Shifra ?

3 0
3 years ago
If a person walks first 70 m in the direction 37° north of east, and then walks 82 m in the
timurjin [86]

Aster's final position from her initial position is 63 m approximately. She will head north west direction to return to her initial position

<h3>What is Displacement ?</h3>

Displacement is the distance travelled in a specific direction. It is a vector quantity.

Given that a person walks first 70 m in the direction 37° north of east, and then walks 82 m in the direction 20° south of east, and finally walks 28 m in the direction 30° west of north.

a) Let P be the Aster's final position from her initial position?

We can use bearing by using Cosine formula to solve this question.

P² = 70² + 82² - 2 × 70 × 82 cos 73

P² = 4900 + 6724 - 11480 cos 73

P² = 11624 - 3356.43

P² = 8267.57

P = √8267.57

P = 90.9 m

P = 90.9 - 28

P = 62.9 m

We can get the angle by using Sine rule

82/ sin Ф = 90.9 / sin 73

sin Ф = 0.8627

Ф = Sin^{-1} (0.8627)

Ф = 59.6°

Ф = 60°

b)  She will head north west direction to return to her initial position

Learn more about Displacement here: brainly.com/question/2109763

#SPJ1

3 0
1 year ago
Water starts to freeze from top whereas wax starts to freeze from bottom?why?​
Nezavi [6.7K]

Answer:

im pretty sure its because wax has i higher melting point therefore it would cool quicker if the temperature dropped more. water has a lower melting point so it takes longer to freeze i think. i hope this helps

7 0
3 years ago
If a 10-volt battery is placed across a 2-ohm resistance (R = 2Ω), a current of amperes will flow.
kompoz [17]
The formula for solving voltage is V=IR where V represents the voltage, where "I" represent the current and R represents the resistance. Then, the given values are enumerated below and these will help us in solving for the unknown.
V=10 volts
I=?
R=2 ohms
V=IR
I=V/R
I=10/2
I=5 amperes
Therefore, the current is 5 amperes.
3 0
4 years ago
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