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2 years ago

Write each of Newton's three laws of motion. Use your own wording.

Physics

1 answer:

12345 [234]2 years ago

5 0

Answer:

In the first law ,an object will not change its motion unless a force acts on it. In the second law force on an object is equal to its mass times its acceleration. In the third law ,when two objects interact , they apply forces to each other of equal magnitude and opposite direction

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A small object with mass m, charge q, and initial speed v0 = 5.00 * 103 m>s is projected into a uniform electric field betwee

kotykmax [81]

Answer:

q/m = 2177.4 C/kg

Explanation:

We are given;

Initial speed v_o = 5 × 10³ m/s = 5000 m/s

Now, time of travel in electric field is given by;

t_1 = D_1/v_o

Also, deflection down is given by;

d_1 = ½at²

Now,we know that in electric field;

F = ma = qE

Thus, a = qE/m

So;

d_1 = ½ × (qE/m) × (D_1/v_o)²

Velocity gained is;

V_y = (a × t_1) = (qE/m) × (D_1/v_o)

Now, time of flight out of field is given by;

t_2 = D_2/v_o

The deflection due to this is;

d_2 = V_y × t_2

Thus, d_2 = (qE/m) × (D_1/v_o) × (D_2/v_o)

d_2 = (qE/m) × (D_1•D_2/(v_o)²)

Total deflection down is;

d = d_1 + d_2

d = [½ × (qE/m) × (D_1/v_o)²] + [(qE/m) × (D_1•D_2/(v_o)²)]

d = (qE/m•v_o²)[½(D_1)² + D_1•D_2]

Making q/m the subject, we have;

q/m = (d•v_o²)/[E((D_1²/2) + (D_1•D_2))]

We have;

E = 800 N/C

d = 1.25 cm = 0.0125 m

D_1 = 26.0 cm = 0.26 m

D_2 = 56 cm = 0.56 m

Thus;

q/m = (0.0125 × 5000²)/[800((0.26²/2) + (0.26 × 0.56))]

q/m = 312500/143.52

q/m = 2177.4 C/kg

8 0

3 years ago

Jacob drives his car 7 km east. He stops for lunch, then drives 5 km south before driving 2 km east. What distance did he cover?

Varvara68 [4.7K]

Option (d) is correct.

Distance is the total path length covered by the object.

so, for distance, we add all the path lengths

Here the total distance =7+5+2 =14 km

6 0

3 years ago

Con base en el tema ley de ohm, resistividad y resistencia resuelva los siguientes

Bumek [7]

Answer:Explanation:gfgfgfgfgfgfgfgfgfg

3 0

3 years ago

The magnetic moment of the Earth is approximately 8.00 ×10²²A.m² . Imagine that the planetary magnetic field were caused by the

Serhud [2]

$4.315 \times10^{45}$ unpaired electrons,are required each with a magnetic moment of 9.27 ×10⁻²⁴A.m² , to participate .

Magnetic moment, also called magnetic dipole moment, is a measure of the tendency of an object to align with a magnetic field.
Magnetic moment is a vector quantity. Objects tend to be placed so that their magnetic moment vectors are parallel to the lines of magnetic force.
The direction of the magnetic moment points from the south pole of the magnet to the north pole. The magnetic field produced by a magnet is directly proportional to its magnetic moment.

"Magnetic moment is defined as the magnetic strength and orientation of a magnet or other object that produces a magnetic field."

It is given that magnetic moment of the Earth is approximately 8.00 ×10²²A.m² .

Number of unpaired is found by dividing the magnetic moment of the Earth to the given magnetic moment of 9.27 ×10⁻²⁴A.m²

$n=\frac{8.00\times10^{22}}{9.27\times10^{-24}} \\\\n=8.63\times10^{45}$

Each iron atom has two unpaired electrons, so the number of iron atoms required is $\frac{1}{2}\times 8.63\times10^{45}=4.315\times10^{45}$ electrons.

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6 0

2 years ago

The sun delivers thermal energy to earth through radiation. which of the following is a consequence of this energy transfer

Zigmanuir [339]

Answer:

life is possible on earth

Explanation:

The sun delivers thermal energy to earth through radiation. Due to solar energy life of earth is possible on earth because all the process of human life depends on the solar energy. Due to sunlight plants grow and prepare there food. Human and plant cycle depends on the food prepared by plant. Thus, we can say that life on earth is possible due to thermal energy provided by sun.

4 0

3 years ago

Read 2 more answers