I notice the wheels on my bicycle spin in a circular motion as I am pedaling. I know that the
wheels have a radius of 0.31m and they are going at a speed of 15 m/s. What is the centripetal
acceleration of my bike wheel?

Guess method

Answer:

Centripetal force

Explanation:

The force that keeps a bottle moving round and round in circular motion is centripetal force.

Centripetal force is an inward directed force that keeps a body in circular motion. This force keeps a body moving along a circular path.

To find the force, we use the expression below;

     F = [tex]\frac{mv^{2} }{r}[/tex]

F is the centripetal force

m is the mass of the body

v is the velocity

r is the radius

Answer:

Explanation:

The kinetic energy of the car can be found by using the formula

[tex]k = \frac{1}{2} m {v}^{2} \\ [/tex]

m is the Mass

v is the velocity

From the question we have

[tex]k = \frac{1}{2} \times 1200 \times {5.5}^{2} \\ = 600 \times 30.25[/tex]

We have the final answer as

Hope this helps you

Answer:

Try copy and pasting the intructions it into google, and it should pop up if it exists.

Hope this helps.

Explanation:

Answer:

Send me the download of the lab and I will complete it for you

Answer:

This is what I got the teacher hasn’t graded it yet so sorry if it’s not right

Explanation:

Answer:

 fr ’= ½ F

Explanation:

For this exercise we use the translational equilibrium equation, on the axis parallel to the wall

              fr - W = 0

              fr = W

for the adult man they indicate that the friction force is equal to F

              F = M g

we write the equilibrium equation for the child

             fr ’= w’

             fr ’= m g

in the statement they tell us that the mass of the adult is 2 times the mass of the child

             M = 2m

we substitute

            fr ’= M / 2 g

            fr ’= ½ Mg

we substitute

            fr ’= ½ F

therefore the force of friction in the child is half of the friction in the adult

Answer:

13 N to the left

Explanation:

the right side adds up to 1550 13 less than the other side. the box will then be pushed left with 13 newtons of force.

Answer: All of the above.

Explanation:

Answer:

deez nouts

Explanation:

Answer: Yes, two vectors of equal magnitude that are pointing in opposite directions will sum to zero

Explanation: Two vectors of unequal magnitude can never sum to zero. If they point along the same line, since their magnitudes are different, the sum will not be zero.

Answer: option C.

Fabrics such as cotton and silk are synthetic polymers

Explanation:

Fabrics such as cotton and silk are synthetic polymers because cotton and silk are natural polymers meaning they are gotten from natural source. Cotton is gotten from cotton plants and it is composed of cellulose which is a carbohydrates.

Silk also is gotten from animals I.efrom insect fibre or the cocoons of the larvae of the mulberry silkworm which is a polymer.

Incomplete question; Full question read;

Type the correct answer in the box. Spell all words correctly. Stephen is a student who wants to test his knowledge of medical terminology. Which option could he use?

For medical terminology, ___________ can include a single word part on one side, with the meaning on the other side. Stephen can test himself or can enlist the help of someone else to hold them up to test him.

Answer:

Flashcard

Explanation:

It is interesting to note that a flashcard is an effective memory and teaching aid. It usually has a question on one side, and the other side contains the answer.

Hence, Stephen can build his knowledge of medical terminology by making use of a flashcard himself or can enlist the help of someone else to hold them up to test him.

Answer:

meter

The SI unit of distance and displacement is the meter [m].

Explanation:

have advancedd

Answer:

meter

Explanation:

it is meter I hope this is helpful

Answer:

Specific latent heat or specific vaporation vaporization heat

on:

Uses mass only do to no temperature change only state

Answer:

the answer is B

Explanation:

The development of the theory of reinforcement by B. F. Skinner (Burrhus Frederick Skinner) and his behaviors support for its application to learning contributed to the emergence of the behaviorism and programmed instruction movements. Thus, option B is correct.

Small instructional frames, self-pacing, active learner reaction to inserted questions, and fast feedback regarding behaviors the accuracy of a response are all characteristics of programmed instruction.

In essence, individualized education substitutes methodical or pre-programmed materials for the behaviors. Individualized teaching can be delivered by print, computer, or other medium as long as it is founded on the ideas mentioned above.

Therefore, The psychologist who believed that behaviors that are followed by favorable consequences tend to be repeated was B. F. Skinner.

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Answer:

If you ring the doorbell and no one opens the door, you'll infer that no one is home rather than continuing to ring the doorbell to an empty house. Being able to understand this and look for another solution is another example of mental flexibility.

Explanation:

Answer:

It means...

Explanation:

The mechanical advantage of a machine is 4. Mechanical advantage MA is the ratio of output (generated by the machine) force to input (applied to the machine) force. So MA = 4 means that for example if you apply 100 N then your machine will multiply that force and generate 400 N.

Answer:

The mechanical advantage of a lever is 4 means that the lever can lift a load which is four times greater than the applied effort.

Hope I helped!

Best regards! :D

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Answer:

250 Joules

Explanation:

The formula is KE = 1/2m*v^2

Answer:

Mass, m = 16.02kg

Explanation:

Given the following data;

Force, F = 157N

Since it's a free fall, acceleration, a = g = 9.8m/s² (acceleration due to gravity).

To find the mass;

Force is given by the multiplication of mass and acceleration.

Mathematically, Force is;

[tex] F = ma[/tex]

Where;

Making mass (m) the subject of formula, we have;

[tex]Mass (m) = \frac{F}{a}[/tex]

Substituting into the equation;

[tex]Mass (m) = \frac{157}{9.8}[/tex]

Mass, m = 16.02kg

Therefore, the mass of the rock is 16.02kg.

The water exerts a net drag force on the boat, and tends to make the boat move along with the average water flow, or stay put if the water isn't going anywhere. The water will heat up slightly as energy from the big motion ...

Answer:

Elephant

Explanation:

has a larger mass which equates to greater momentum

Answer:

15kg

Explanation:

mass = weight / gravitational field strength

mass = 150 / 9.8 = 15kg (nearest whole no)

The mass of the object on earth whose weight is 150 N will be 15.3 Kg

Mass is the amount of matter present inside a body. It is defined as the product of density and volume. It remains constant through out the universe. Mathematically -

M = ρV

where -

M is Mass

ρ is density

V is volume

Given is your weight on earth which is equivalent to 150 N.

We know that the weight of of an object is a force exerted by the earth towards its center. It can be written as -

W = mg

Weight of the object = [W] = 150 N

Acceleration due to gravity on earth = [g] = 9.8 m/s²

Substituting the values -

150 = m x 9.8

m = 150/9.8

m = 15.3 Kg

Therefore, the mass of the object on earth whose weight is 150 N will be 15.3 Kg.

To solve more questions on Mass and weight, visit the link below-

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Answer:

9.8 m/s/s

Explanation:

The horizontal velocity of a projectile is constant (a never changing in value), There is a vertical acceleration caused by gravity; its valueis 9.8 m/s/s, down, The vertical velocity of a projectile changes by 9.8 m/s each second, Thehorizontal motion of a projectile is independent of its vertical motion.

Answer:

the horizontal component of the velocity, however, retains its initial value v0x=+115 m/s throughout the entire descent.

Explanation:

since the plane also travels at a constant horizontal velocity of +115 m/s, it remains directly above the falling package.

Answer:

A

  The distance in revolutions is [tex]n = 7 \ revolutions[/tex]

    The distance in degrees  is  [tex]\theta =2529 ^ o[/tex]

   The distance in radian is  [tex]\theta_{radian } = 44.15 \ rad[/tex]

B

  [tex]\theta_a = 1.26 \ rad[/tex]

Explanation:

From the question we are told that

  The diameter of the pie is  [tex]d = 10.00 \ in[/tex]

  The distance covered by the rim  is  [tex]D = 208 \ in[/tex]

   The number which the pie is divided into  is  k = 5

Generally the radius of the pie is mathematically represented as

      [tex]r = \frac{d}{2}[/tex]

=>  [tex]r = \frac{10}{2}[/tex]

=>  [tex]r = 5 \ in[/tex]

Generally the distance covered by the rim is mathematically represented as

    [tex]D= 2 \pi r n[/tex]

=>  [tex]208 = 2* 3.142 * 5 * n[/tex]

=> [tex]n = 7 \ revolutions[/tex]

Generally converting to  degrees

     [tex]\theta = n * 360[/tex]

=>  [tex]\theta = 7 * 360[/tex]

=>  [tex]\theta =2529 ^ o[/tex]

Generally converting to  radian

   [tex]\theta_{radian } = \frac{\theta * \pi}{180 }[/tex]

=>[tex]\theta_{radian } = \frac{2520 * 3.142 }{180}[/tex]

=>[tex]\theta_{radian } = 44.15 \ rad[/tex]

Generally the angular size of one piece of the pie is  

      [tex]\theta_a = \frac{2 * \pi }{ k}[/tex]

=> [tex]\theta_a = \frac{2 * 3.142}{ 5}[/tex]

=> [tex]\theta_a = 1.26 \ rad[/tex]

(a) The angular distance is 0.168 revolution, 1.056 radians and 60.5⁰.

(b) The angular size of one slice in radians is 2π radian.

The given parameters;

The angular distance traveled by the pie plate is calculated as follows;

2πr = 5.28

[tex]2\pi = \frac{5.28}{r} \\\\2 \pi = \frac{5.28}{5} \\\\2\pi = 1.056 \ rad\\\\\frac{1 \ rev}{2\pi \ rad } \times 1.056 \ rad = 0.168 \ rev[/tex]

[tex]1.056 \ rad \times \frac{360^0}{2\pi \ rad} = \ 60.5^0[/tex]

Thus, the angular distance is 0.168 revolution, 1.056 radians and 60.5⁰.

The circumference of the pie is calculated as follows;

C = 2πr

C = 2π x 5

C = 10π

Diving the pie into 5 equal slice;

[tex]Fraction \ of \ one \ part \ in \ radian= \frac{10\pi}{5} = 2\pi\ radian[/tex]

Thus, the angular size of one slice in radians is 2π radian.

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Answer:

C. Density

Explanation:

Answer:

The boat's acceleration is 4 m/s²

Explanation:

This question seeks to test the knowledge of acceleration and how to calculate acceleration when the speed is provided. Hence, the formula for acceleration would be used here.

Acceleration (m/s²) = speed (in m/s) ÷ time (in seconds)

Acceleration = 80 m/s ÷ 20 secs

Acceleration = 4 m/s² or 4 ms⁻²

The boat's acceleration is 4 m/s²

Answer:

0 m/s

Explanation:

In this problem,

A ball thrown vertically upward reaches a maximum height of 30 meters above the surface of Earth. We need to find the speed of the ball at the maximum height. When an object reaches its maximum height, after then it starts to decrease its speed. As a result, the speed of the ball will be equal to 0 m/s.

The speed of the ball thrown upwards is zero when the object reaches maximum height.

The given parameter:

The velocity of an object thrown upwards decreases with time because the object is moving against gravity, and the eventually becomes zero when the object reaches maximum height.

[tex]v_f = v_0 - gt= 0[/tex]

Thus, the speed of the ball thrown upwards is zero when the object reaches maximum height.

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Answer:The four main branches of physical science are astronomy, physics, chemistry, and the Earth sciences, which include meteorology and geology.

Answer:

Chemistry, physics, astronomy and earth science.

Explanation:

The four main categories of physical sciences are chemistry, physics and earth science and astronomy. Life sciences deal with living organisms and behavioral sciences deals with the interactions between organisms in the natural world.

Answer:  10 m/s

We're told the speed is constant, so it's not changing throughout the time period given to us. So throughout the entire interval, the speed is 10 m/s.