Does a force cause motion or a change in motion

Answers

Answer 1

Answer: it changes the motion as Newton's second law of motion states that a force, acting on an object, will change its velocity by changing either its speed or its direction or both. If your basketball goes rolling into the street and is hit by a bike, either the ball will change direction or its speed or both.

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If an object has a mass of 50 kg and is accelerating at 2m/s/s, what is the force it will exert?

Answers

the formula you're looking for is Force = mass * acceleration. this means the force = 50 * 2, which is 100N

Three resistors (R1 = 120 Ohms, R2 = 330 Ohms, and R3 = 240 Ohms) and an ideal inductor (L = 1.6 mH) are connected to a battery (V = 9 V) through a switch as shown in the figure below.The switch has been open for a long time before it is closed at t = 0. At what time t0, does the current through the inductor (I3) reach a value that is 63% of its maximum value?

Answers

The time at which the current through the inductor reaches 63% of the maximum current is 4.85 $\mu$ s

What is current?

The current is defined as the flow of the charge in the circuit is is the rate of flow of the charge.

At t=0 s there is no current in the circuit because the switch is not closed and the circuit is not complete. The current across the LR circuit increases exponentially, when the switch is closed, and becomes steady after a certain time.

Given that

The value of resistor is .120 ohm

The value of resistor is .330 ohm

The value of resistor is .240ohm

The value of the inductor is .1.6 mh

The voltage applied across the circuit is .9 V

To determine the value of effective resistance of this circuit we need to look at the circuit from inductor’s side i.e., from inductor’s side the resistors is connected in series with the parallel combination of resistors

The effective resistance of the circuit is:

$R_(eff)=R_a+(R_1* R_2)/(R_1+R_2)$ …… (1)

Here, $R{eff$ is the effective resistance of the circuit. Now substituting the values.

$R_(eff)=240+(120* 330)/(120+330)=328\ ohm$

The current through the inductor is:

$i=i_o(1-e^{(tR_(eff))/(L)})$ ...... (2)

Here, is the current across the inductor, io is the maximum current in the circuit and L is the inductance across the inductor.

The current across the inductor is equal to the 63% of the maximum current in the circuit.

The current across the inductor is:

i=0.63io

Substitute 0.63io for 328 ohm , for 1.6 mH and for L in equation (2).

$0.63 i_o=i_o(1-e^(-t(328))/(1.6)})$

Simplify the above expression.

$e^((-2.05*10^6))=0.37$

Taking natural log on both sides and simplify.

$t=4.85* 10^(-6)\ s$

$t=4.85 \mu s$

Thus, the time at which the current through the inductor reaches 63% of the maximum current is $t=4.85 \mu s$

To know more about current follow

brainly.com/question/24858512

The time at which the current through the inductor reaches 63% of the maximum current is $\fbox{\begin\n4.85 \mu s\end{minispace}}$ or $\fbox{\begin\n4.85 * {10^( - 6)}\,{\text{s}}\end{minispace}}$ .

Further Explanation:

At $t = 0\,{\text{s}}$ there is no current in the circuit because the switch is not closed and the circuit is not complete. The current across the LR circuit increases exponentially, when switch is closed, and becomes steady after certain time.

Given:

The value of resistor is $120\,\Omega$ .

The value of resistor is $330\,\Omega$ .

The value of resistor is $240\,\Omega$ .

The value of the inductor is $1.6\,{\text{mH}}$ .

The voltage applied across the circuit is $9\,{\text{V}}$ .

Concept:

To determine the value of effective resistance of this circuit we need to look at the circuit from inductor’s side i.e., from inductor’s side the resistors ${R_3}$ is connected in series with the parallel combination of resistors ${R_1}$ and ${R_2}$ .

The effective resistance of the circuit is:

$\fbox{\begin\n{R_(eff)} = {R_3} + \frac{{{R_1} * {R_2}}}{{{R_1} + {R_2}}}\end{minispace}}$ …… (1)

Here, ${R_(eff)}$ is the effective resistance of the circuit.

Substitute the $120\,\Omega$ for ${R_1}$ , $330\,\Omega$ for ${R_2}$ and $240\,\Omega$ for ${R_3}$ in equation (1).

$\begin{aligned}{R_(eff)}&=240\,\Omega+\frac{{\left( {120\,\Omega } \right) * 330\,\Omega }}{{120\,\Omega +330\,\Omega }} \n&=328\,\Omega\n \end{aligned}$

The current through the inductor is:

$\fbox{\begin\ni = {i_0}\left( {1 - {e^{ - \frac{{t{R_(eff)}}}{L}}}} \right)\end{minispace}}$ ...... (2)

Here, $i$ is the current across the inductor, ${i_0}$ is the maximum current in the circuit and $L$ is the inductance across the inductor.

The current across the inductor is equal to the 63% or times of the maximum current in the circuit.

The current across the inductor is:

$i = 0.63{i_0}$

Substitute $0.63{i_0}$ for $i$ , $328 \Omega$ for ${R_(eff)}$ and $1.6\,{\text{mH}}$ for $L$ in equation (2).

$0.63{i_0} = {i_0}\left( {1 - {e^{ - \frac{{t\left( {328\Omega } \right)}}{{\left( {1.6\,{\text{mH}}} \right)}}}}} \right)$

Simplify the above expression.

${e^{ - \left( {2.05 * {{10}^6}} \right)t}}= 0.37$

Taking natural log on both sides and simplify.

$\begin{aligned}t&=4.85\, * {10^( - 6\,)}\,{\text{s}} \n&=4.85\mu \text{s}}\n\end{aligned}$

Thus, the time at which the current through the inductor reaches 63% of the maximum current is $\fbox{\begin\n4.85 \mu s\end{minispace}}$ or $\fbox{\begin\n4.85 * {10^( - 6)}\,{\text{s}}\end{minispace}}$ .

Learn more:

1. Conservation of energy brainly.com/question/3943029

2. Average translational energy brainly.com/question/9078768

3. The motion of a body under friction brainly.com/question/4033012

Answer Details:

Grade: Middle School

Subject: Physics

Chapter: Current Electricity

Keywords:

Resistor circuit, LR circuit, current, current across inductor, time constant, 4.85 microsecond, 4.85 microsec, 4.85 micros, 4.85*10-6 s, 4.85*10^6 s, 4.85*10-6 sec, 4.85*10^6 sec.

Which electromagnetic waves emitted from the sun produce a heating effect?

Answers

ANY electromagnetic waves emitted from the sun and absorbed by something
will raise the thing's temperature.

Regarding our skin . . . the electromagnetic waves emitted from the sun that
produce a heating effect are known commonly as "heat", or in more technical
jargon as "infrared radiation".

What describes a basic principle of nature that always occurs under certain conditions.

Answers

A basic principle of nature that always occurs under certain conditions is called a law. An example of that can be Newton's laws or the Laws of Thermodynamics since they are very famous laws in the world of science.

Subject: Science Why is it important to report experimental results honestly even when the results go against your hypothesis?

Answers

Because if you're not truthful about your results then the science community will never believe anything else you publish even if it's true.

A driver accelerates his first car at the rate of 1.8 m/s2 and then at the rate of 1.2m/s2. calculate the ratioof the force exerted by the engine in the two cases?

PLEASE ANSWER FAST

Answers

F = m A ... acceleration is directly proportional to force, so ratio of forces is equal to ratio of accelerations. 1.8/1.2 = 1.5 . . . . Sorry this is as fast as I can type on my phone.

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