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aivan3 [116]
2 years ago
13

If a car with a mass of 1,200 kg traveling westward at 30 m/s is

Physics
1 answer:
forsale [732]2 years ago
5 0

The net force acting on the car is equal to -12000 Newton.

<u>Given the following data:</u>

  • Mass = 1,200 kg
  • Initial velocity = 30 m/s.
  • Final velocity = 0 m/s (since the car came to a stop).
  • Time = 3 seconds.

To determine the net force acting on the car:

<h3>How to calculate the net force.</h3>

Mathematically, the net force acting on the car is given by Newton's Second Law of Motion:

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

<u>Where:</u>

  • m is the mass.
  • t is the time.
  • u is the initial velocity.
  • u is the final velocity.

Substituting the given parameters into the formula, we have;

F = \frac{1200 \times (0\;-\;30)}{3}\\\\F = \frac{1200 \times (-30)}{3}\\\\F = \frac{-36000 }{3}

Net force = -12000 Newton.

Read more on net force here: brainly.com/question/1121817

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In reading the instruction manual that came with your garagedoor opener, you see that the transmitter unit in your car produces
iVinArrow [24]

Answer:

0.09221 V/m

Explanation:

\mu_0 = Vacuum permeability = 4\pi \times 10^{-7}\ H/m

P = Power of transmitter = 250 mW

r = Distance to source = 42 m

c = Speed of light = 3\times 10^8\ m/s

E_0 = Electric field amplitude

Intensity of a wave is given by

I=\frac{P}{4\pi r^2}\\\Rightarrow I=\frac{250\times 10^{-3}}{4\pi \times 42^2}\\\Rightarrow I=1.12779\times 10^{-5}\ W/m^2

Intensity is also given by

I=\frac{E_0^2}{2\mu_0 c}\\\Rightarrow E_0=\sqrt{I2\mu_0 c}\\\Rightarrow E_0=\sqrt{1.12779\times 10^{-5}\times 2\times 4\pi \times 10^{-7}\times 3\times 10^8}\\\Rightarrow E_0=0.09221\ V/m

The electric field amplitude at the receiver when it first fails is 0.09221 V/m

3 0
4 years ago
At a separation distance of 0.500-m, two like-charged balloons experience a repulsive force of 0.320 N. If the distance is is de
soldi70 [24.7K]

Answer:

2.9 N

Explanation:

When the separation distance, r, is 0.5 m, the electrostatic force is 0.32 N. Electrostatic force is given as:

F = (k * q1 * q2) / r²

Where F = force acting on the balloons

k = Coulombs constant

Therefore:

0.32 = (k * q1 * q2) / 0.5²

=> k * q1 * q2 = 0.32 * 0.5² ------------(1)

When the distance is decreased by 3, that is r = r/3 = 0.5/3

F = (k * q1 * q2) / (0.5/3)² ------------(2)

Putting (1) into (2):

=> F = (0.32 * 0.5²) / (0.5/3)²

F = (0.32 * 0.5² * 3²) / 0.5²

F = 2.9 N

Therefore, the force would be 2.9 N

3 0
3 years ago
In the blanks below write what the independent variable and the dependent variable would be for each experiment. (what are you t
tiny-mole [99]

Answer:

1. independent- if you studied. dependent- test scores

2. independent- behavior of students. dependent-student grades

3. independent- what you eat. dependent- amount of gas

4. independent- which bait you use. dependent- how much fish you catch

5. independent-if you talk to the plants or not. dependent- growth

6. independent- whether you eat breakfast or not. dependent-student performance

7. independent- which animal you test. dependent- speed of the animals

8. independent- how much candy you eat. dependent- cavities or not

9. independent- if you eat no sugar or no carbs. dependent- how much weight you lose

10. independent- which thing you measure. dependent- the measurements

4 0
3 years ago
What describes Newton’s law of universal gravitation
VikaD [51]

Newton's law of universal gravitation gives the gravitational force between two objects:

F = GMm/r²

F = gravitational force, G = gravitational constant, M & m are the masses of the two objects, r = distance between the objects

8 0
4 years ago
How many atoms of hydrogen are represented by the formula:<br> A) 1<br> B) 4<br> C) 8<br> D) 28
Keith_Richards [23]
<span>It takes only one atom to make hydrogen; however, hydrogen is commonly found as H2, meaning two atoms make up hydrogen. Because of this, hydrogen is known as a diatomic element 

The answer is prob A.1 but you didnt' give me a formula.</span>
8 0
4 years ago
Read 2 more answers
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