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3 years ago

If for every action force an equal and opposite reaction force exlsts, how can anything ever be accelerated?

Physics

1 answer:

klasskru [66]3 years ago

3 0

Answer:

Explanation:

The net force is the force between action and reaction and when this forces are not the same an acceleration is spurred.

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What is the current flowing through the circuit shown? (V= 120 V, R₁ = 20 02,

spayn [35]

Assumed that resistors are connected in series .

R_net=20+50+10=80ohm

Voltage=V=120V

Current=I

V/R
120/80
3/2
1.5A

3 0

2 years ago

Suppose a fireworks shell explodes, breaking into three large pieces for which air resistance is negligible. How is the motion o

denis-greek [22]

The center of mass isn't affected by the explosion.

To find the answer, we need to know about the trajectory of motion at zero external force.

<h3>How is the trajectory of an object changed when the net external force on it is zero?</h3>

When there's no net external force acting on an object, its momentum doesn't change with time.
As its momentum doesn't change, so it continues with the original trajectory.

<h3>Why doesn't the trajectory of firework change when it's exploded?</h3>

When a firework is exploded, its internal forces are changed, but there's no external force.
So, although the fragments follow different trajectories, but the trajectory of center of mass remains unchanged.

Thus, we can conclude that the center of mass isn't affected by the explosion.

Learn more about the trajectory of exploded firework here:

brainly.com/question/17151547

#SPJ4

3 0

2 years ago

Which color of white light bends the least when it is refracted by a prism

sdas [7]

Red light, while violet light is most.

Since violet light has a shorter wavelength, it is slowed more than the longer wavelengths of red light. Consequently, violet light is bent the most while red light is bent the least. This separtion of white light into its individual colors is known as dispersion of light. *It's from Google as well

4 0

4 years ago

A CAT scan produces equally spaced cross-sectional views of a human organ that provide information about the organ otherwise obt

Furkat [3]

Answer:

V = 1113 cm³

Explanation:

given,

length of liver = 15 cm

n = 5

$\Delta x = \dfrac{b-a}{n}$

$\Delta x = \dfrac{15-0}{5}$

$\Delta x =3$

The midpoints will be odd multiples of 1.5 cm, corresponding to given values.

values are shown in the tables attached below

V = Δx (A(1.5)+A(4.5)+A(7.5)+A(10.5)+A(13.5))

V = 3 x (18 +79 + 107 + 129 +38)

V = 3 x 371

V = 1113 cm³

volume of liver is equal to V = 1113 cm³

8 0

3 years ago

You know your mass is 62 kg but when you stand on a bathroom scale in an elevator it says your mass is 77 kg what is the acceler

lbvjy [14]

In a stationary situation, the weight of person is
$W=mg=(62 kg)(9.81 m/s^2) = 608.2 N$
This is the weight "felt" by the scale, which is basically the normal reaction applied by the scale on the person, and which uses the value of g (9.81) as reference to convert the weight (602.8 N) into a mass (62 kg).

When the person is in the elevator, the scale says 77 kg. The scale is still using the same value of conversion (9.81), so the apparent weight "felt" by the scale is
$W' = m'g=(77 kg)(9.81 m/s^2)=755.4 N$
This is the normal reaction applied by the scale on the person, and which is directed upward. Besides this force, there is still the weight W of the person, acting downward. So, if we use Newton's second law:
$\sum F = ma$
$W-W'=ma$
where a is the acceleration of the elevator. If we solve for a, we find
$a= \frac{W-W'}{m}= \frac{608.2N-755.4N}{62 kg}=-2.37 m/s^2$
The negative sign means the acceleration is in the opposite direction of g (which we take positive), so it means the elevator is going upward.

4 0

3 years ago