What is the rate at which work is done?

Answer:968 m/s

Explanation:

If a race car travels on a straight racetrack with a forward velocity of 44 m/s and slows at a constant rate to a velocity of 22 m/s over 11 s, then the distance traveled by the race car would be 343 m.

There are three equations of motion given by  Newton

The first equation is given as follows

v = u + at

the second equation is given as follows

S = ut + 1/2×a×t²

the third equation is given as follows

v² - u² = 2×a×s

As given in the problem Question a race car travels on a straight racetrack with a forward velocity of 44 m/s and slows at a constant rate to a velocity of 22 m/s over 11 s,

initial velocity = 22 m/s

final velocity =  44 m/s

time = 11 s

By using the first equation of motion,

v = u + at

44 = 22 + 11a

11a = 22

a = 2 m/s²

By using the second equation of motion,

S = ut + 1/2*a*t²

u= 22m/s , a= 2m/s² and t = 11seconds

S = 22*11 + 0.5*2*11²

S = 222+121

S= 343 m

Thus, the distance covered by the race car would be 343 m.

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Answer:

As a pendulum swings, its potential energy changes to kinetic energy, then back to potential energy, then back to kinetic energy, and so forth.

hope this helped<3

Answer:

Two extinct species that share a close evoluntionary relationship with humpback whales are Dourdon and Basilosaurs. They had tailfins

No we do not have any body structure similarities to them. Scientist classify each organism by looking at their characteristics and their appearance. Yes it tells you something about the evoluntinary lineage becuase throw characteristics it can show how they have evolved

The conclusions that I can draw is that we do have some things common with humpback whales. Yes my original predictions were correct. They do have a common evoluntianry link as I stated in the beginning. I learned alot more than I knew at first about the similarties.

Explanation:

run me my points gimme 5 stars and a thanks. Why? cus i ran dem answers cmon now

Answer:

the person above me is right

Explanation:

That would depend on how much it weighs

Answer:

The gravitational potential energy of an item is determined by its weight and height above the ground, whereas elastic potential energy is determined by the form of the object. When an elastic item is stretched or compressed, this occurs.

Answer:

3,900

Explanation:

1st law INERTIA

2nd law (Force = mass x acceleration)

3rd law (all actions have opposite reaction)

Answer:

maybe the third one....

Answer:

0-0 what is rhat supposed to mean. i dont think anyone can answer that lol

0.00004

Explanation:

velocity of electromagnetic waves = 3.0×10^8.

Wavelength=velocity/frequency

(3.0×10^8) (7.5×10^12)

Answer:

six crewed landings

Explanation:

Answer:

Place the nickel at 1" point on the ruler for each trial. Then, drop the quarter from 12" for each trial.

Here are the results-

Middle Trials (6")

T1: moved right about 0.5"

T2: moved left 1" and backwards 0.5" (-0.5")

T3: moved right 2" and backwards 0.5" (-0.5")

______________________________________

9" trials

T1: Right about 1"

T2: Right 0.5"

T3: around 0.8" foward

______________________________________

12" trials were all at 0" in change

______________________________________

The 12" trial requires more force for movement while the 9" trial gave the most positive changes forwards.

Explanation:

Information-

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Answer:

Potential Energy is given as:

P.E = mgh

which means P.E is directly proportional to height 'h'.

Kinetic Energy is given as:

K.E = (1/2)mv²

which means K.E is directly proportional to velocity 'v²'.

Total Energy of Pendulum = K.E + P.E

1. The pendulum has the most potential energy at extreme position because the height is maximum at the extreme position.

2. The pendulum has the least kinetic energy at extreme position because the velocity is zero at extreme position.

3. The pendulum has most kinetic energy at the mean position because the velocity is maximum at this point.

4. The pendulum has the least potential energy at the mean position because the height is minimum.

A rule to remember: The point where K.E is maximum, P.E is zero at this point and vice versa.Potential Energy is given as:

P.E = mgh

which means P.E is directly proportional to height 'h'.

Kinetic Energy is given as:

K.E = (1/2)mv²

which means K.E is directly proportional to velocity 'v²'.

Total Energy of Pendulum = K.E + P.E

1. The pendulum has the most potential energy at extreme position because the height is maximum at the extreme position.

2. The pendulum has the least kinetic energy at extreme position because the velocity is zero at extreme position.

3. The pendulum has most kinetic energy at the mean position because the velocity is maximum at this point.

4. The pendulum has the least potential energy at the mean position because the height is minimum.

A rule to remember: The point where K.E is maximum, P.E is zero at this point and vice versa.Potential Energy is given as:

P.E = mgh

which means P.E is directly proportional to height 'h'.

Kinetic Energy is given as:

K.E = (1/2)mv²

which means K.E is directly proportional to velocity 'v²'.

Total Energy of Pendulum = K.E + P.E

1. The pendulum has the most potential energy at extreme position because the height is maximum at the extreme position.

2. The pendulum has the least kinetic energy at extreme position because the velocity is zero at extreme position.

3. The pendulum has most kinetic energy at the mean position because the velocity is maximum at this point.

4. The pendulum has the least potential energy at the mean position because the height is minimum.

A rule to remember: The point where K.E is maximum, P.E is zero at this point and vice versa.

Explanation:

Explanation:

Solar technologies convert sunlight into electrical energy either through photovoltaic (PV) panels or through mirrors that concentrate solar radiation. This energy can be used to generate electricity or be stored in batteries or thermal storage.

Answer:

I hope this helps if not I am sorry good luck

Explanation:

The food of the foxes is the voles and if the their population went down of course the foxes would too if the voles went extinct what would the foxes eat surley they would die since their food source is shortened .

Answer:

i think its electrostatic force

Answer:

A continuous and closed path of an electric current is called an electric circuit. An electric circuit consists of electric devices, a source of electricity and wires that are connected with the help of a switch.

Explanation:

All switches do the same thing: Connect wires to allow electric current to flow or disconnect wires to stop electric current from flowing. ... With the switch in the closed position, you've connected the wire (and completed the circuit), and current can flow.

Answer:

These are all the forces acting on the ball: friction, gravity, and a normal force.

Explanation:

At the middle of the ramp their will be potential energy associated with the ball and the total  mechanical energy  will be equal to its potential energy  . At the bottom of the ramp their will be kinetic energy associated with the ball  and  total  mechanical energy  will be equal to its kinetic energy .

Mechanical energy is the energy that is possessed by an object due to its motion or due to its position.

Total mechanical energy = potential energy + kinetic energy

When ball is positioned in the middle of the ramp , the ball is at rest , which implies that total mechanical energy is equal to   potential energy possessed by the ball and their is no kinetic energy at that instant of time , after that it came under the action of forces due to which it rolls down and its potential energy starts converting into kinetic energy and the total mechanical energy will be the sum of potential as well as kinetic energy  and when it reaches at the bottom of the ramp the total mechanical energy will be kinetic energy of the ball.

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Answer:

vf = 32ms

Explanation:

v  =  u  +  a t ,

v  =  0  +  8.0  x  4.0  

v  =  32 ,

v  =  32 m /s  

Hope it Helps! :D  

The centripetal acceleration of the ball been whirled in a circular path is 6m/s².

Hence, Option D) 6m/s² is the

Given the data in the question:

Centripetal acceleration is the acceleration of a particle moving in a circular path. It is expressed as:

[tex]a_c = \frac{v^2}{r}[/tex]

Where [tex]a_c[/tex] is the Centripetal acceleration, v is the speed of the motion and r is the length of the string or radius of the circular pattern.

We substitute our given values into the equation

[tex]a_c = \frac{(3m/s)^2}{1.5m}\\\\a_c = \frac{9m^2/s^2}{1.5m}\\\\a_c = 6m/s^2[/tex]

The centripetal acceleration of the ball been whirled in a circular path is 6m/s².

Hence, Option D) 6m/s² is the correct answer.

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Answer:

Resistance is a measure of the oppostion to flow current in a electrical circuit

Explanation:

I hope it's help u army

Answer:

speed = distance/time

just find the speed if it

Answer:

it is positive feedback loop

Explanation:

It's a phenomenon scientists call a positive feedback loop: deforestation causes drought, which in turn, worsens deforestation, and so on, intensifying the effect. The study concluded that deforestation causes 4% of drought, while drought accounts for 0.13% of deforestation per millimeter of rain in the Amazon biome.

The force is required to swing the mass in a circular path with the given radius and speed is 50 Newtons.

Given the data in the question;

Force; [tex]F =\ ?[/tex]

From the Newton's second law of motion:

[tex]F = ma[/tex]

Where F is force applied, m is mass and a is acceleration

Now force a circular motion Centripetal Acceleration is expressed as:

[tex]a_c = \frac{v^2}{r}[/tex]

Hence,  force is required to swing the mass in a circular path will be:

[tex]F = m * a_c\\\\F = m * \frac{v^2}{r}[/tex]

We substitute our given values into the equation;

[tex]F = 3kg * \frac{(5m/s)^2}{1.5m}\\\\F = 3kg * \frac{25m^2/s^2}{1.5m}\\\\F = 50 kgm/s^2\\\\F = 50N[/tex]

Therefore, force is required to swing the mass in a circular path with the given radius and speed is 50 Newtons.

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Answer:

Astronauts who are orbiting the Earth often experience sensations of weightlessness. These sensations experienced by orbiting astronauts are the same sensations experienced by anyone who has been temporarily suspended above the seat on an amusement park ride. Not only are the sensations the same (for astronauts and roller coaster riders), but the causes of those sensations of weightlessness are also the same. Unfortunately however, many people have difficulty understanding the causes of weightlessness.

Answer:

height and mass

Explanation:

gpe = mass x height x gravitational field strength

Answer:

yes

Explanation:

Equilibrium means that all the forces acting upon the object are balanced. A cruising airplane has all four forces balanced, with no external forces acting on it. As a result it will remain in its motion at a constant velocity until an external force acts upon it