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4 years ago

Why was the second law of motion invented?

1 answer:

3 0

Second law of motion is the quantitative definition of the force and one of the most important laws in physics. Most of the classical physics revolve around the concept of force and so quantitative measurement of it was inevitable, irreplaceable.

Invention of Second law of motion was a need.

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What is the total resistance of two 26 ohm resistors in series?

amid [387]

Answer:

I finish that module I'm sure it's D

4 0

3 years ago

Read 2 more answers

The earth’s gravity pulls with a force of 10N on each kilogram of an object mass calculate the weight of a 15kg sack of potatoes

maw [93]

Answer:

150 N

Explanation:

10*15 = 150 N

4 0

2 years ago

Jason has 13720 J of gravitational potential energy standing at the top of a cliff over the lake. If he jumps off the cliff and

Anna [14]

The conservation of energy and Newton's second law allows us to find the results about Jason's falling motion are;

The energy when reaching the water is K = 13720 J

The average force of the water to stop it is: F = 2744 N

<h3>Energy conservation.</h3><h3> </h3>

The conservation of energy is one of the most important principles of physics, stable that if there is no friction force, mechanical energy is conserved at all points.

Mechanical energy is the sum of kinetic energy plus potential energy.

Let's look for the energy at two points

Starting point. Get higher.

Em₀ = U = 13720 J

Final point. Lower down.

$Em_f$ = K

Friction in the air is negligible, so energy is conserved.

$Em_o= Em_f$

K = 13720J

<h3>Kinematics and Newton's law.</h3><h3> </h3>

They indicate that it stops 5m under the water, if we assume that the water acts with a constant force, we can use kinematics and Newton's second law to find this force.

The kinematics expression to find the acceleration is

v² =v₀² – 2ay

When it stops the speed is zero.

$a = \frac{v_o^2}{2y}$

Newton's second law is:

F = ma

F = m ( $\frac{v_o^2}{2y}$ )

The expression for the kinetic energy is:

K = ½ m v₀²

$v_o^2 = \frac{2K}{m}$

Let's substitute.

F = $m (\frac{2K}{m}) \frac{1}{2y}$

$F= \frac{K}{y}$

Let's calculate.

F= $\frac{13720}{5}$

F = 2744N

In conclusion using conservation of energy and Newton's second law we can find the results about Jason's falling motion are;

The energy when reaching the water is K = 13720 J

The average force of the water to stop it is: F = 2744 N

Learn more about energy here: brainly.com/question/14274074

6 0

2 years ago

Pls help me pls i’m begging u

Minchanka [31]

Answer: Rolling Friction

Explanation:A rolling ball stops because the surface on which it rolls resists its motion. A rolling ball stops because of friction.

3 0

3 years ago

Coherent light with wavelength 540 nm passes through narrow slits with a separation of 0.370 mm . At a distance from the slits w

maks197457 [2]

Answer:

∅=2021rad

Explanation:

Coherent light with wavelength 540 nm passes through narrow slits with a separation of 0.370 mm . At a distance from the slits which is large compared to their separation, what is the phase difference (in radians) i the light from the two slits at an angle of 28.0 ∘ from the centerline?

A wave is a disturbance which travels through a medium, it transfers energy without a permanent displacement of the medium itself. this is an example of light wave

using the formula below

∅= $\frac{2\pi*d }{\beta } sin\alpha$