A horizontal force of 30N is applied to a mass of 10 kg causing it to accelerate. If the coefficient of friction is 0.20 what is the frictional force?
If work is shown that would be great

Answer:

(a) A = 0.0800 m, λ = 20.9 m, f = 11.9 Hz

(b) 250 m/s

(c) 1250 N

(d) Positive x-direction

(e) 6.00 m/s

(f) 0.0365 m

Explanation:

(a) The standard form of the wave is:

y = A cos ((2πf) t ± (2π/λ) x)

where A is the amplitude, f is the frequency, and λ is the wavelength.

If the x term has a positive coefficient, the wave moves to the left.

If the x term has a negative coefficient, the wave moves to the right.

Therefore:

A = 0.0800 m

2π/λ = 0.300 m⁻¹

λ = 20.9 m

2πf = 75.0 rad/s

f = 11.9 Hz

(b) Velocity is wavelength times frequency.

v = λf

v = (20.9 m) (11.9 Hz)

v = 250 m/s

(c) The tension is:

T = v²ρ

where ρ is the mass per unit length.

T = (250 m/s)² (0.0200 kg/m)

T = 1250 N

(d) The x term has a negative coefficient, so the wave moves to the right (positive x-direction).

(e) The maximum transverse speed is Aω.

(0.0800 m) (75.0 rad/s)

6.00 m/s

(f) Plug in the values and find y.

y = (0.0800 m) cos((75.0 rad/s) (2.00 s) − (0.300 m⁻¹) (1.00 m))

y = 0.0365 m

Answer:

Definition: Pressure:- Force per unit area surface is called pressure. P = F/ A Pressure = Force /Area Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure is the pressure relative to the ambient pressure. 

Answer:

A force is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects. When the interaction ceases, the two objects no longer experience the force.

Pressure is defined to be the amount of force exerted per area.

Formula of pressure = P = F÷A

Where, P = Pressure,

            F = Force applied and,

            A = Unit area.

Examples of Pressure is Air pressure.

Answer:

record vibrations of earthquake

Answer:

[tex]\huge\boxed{\sf Option \ 2}[/tex]

Explanation:

Seismograph is an instrument with is used to record vibrations of earthquake.

Seismographs are basically used to detect seismic waves by which scientists can detect the earth's interior and also can find the depths of earthquakes and their intensity.

[tex]\rule[225]{225}{2}[/tex]

Hope this helped!

Answer:

7.67m/s²

Explanation:

The net force on the block is;

  Net force = Force of pull  - Frictional force

mass of block = 4.5kg

force of pull  = 42N

Frictional force  = 7.5N

  Net force  = 42  - 7.5

    Force  = mass x acceleration

    ma  = 34.5

     4.5 x a = 34.5

             a = [tex]\frac{34.5}{4.5}[/tex]   = 7.67m/s²

Answer: The trolley is moving at 2.12m/s

Explanation:

Given from the question that the track and force are horizontal and inline, we have that

F= ma

where F= force= 1.50 N

m= mass = 0.2kg

therefore Acceleration , a = F/ m= 1.50/0.2 =7.5 m/s^2

To find how fast the trolley  is going ie the Velocity, v

Having that

initial velocity at rest , u = 0,

acceleration a = 7.5 and

and distance, s = 30 cm =  30/100 = 0.30 m

we use motion equation that

v² = u² + 2 a s

v² = 0² + 2 x 7.5  x 0.30

v² = 4.5

v = [tex]\sqrt{4.5}[/tex]

v = 2.12 m/s

Answer:

Explanation:

distance = 1.25 mile

time traveled = 5 min.

find velocity in miles / hour

solution:

use the formula: velocity = distance / time

velocity =     1.25 mile     x 60 min  

                     5 min            1 hour

velocity = 15 miles / hour

Answer:

The mass of the object is 133.33 kg

Explanation:

From Newton's second law of motion

F = ma

Where F is the force

m is the mass

and a is the acceleration

From the question,

A stationary object is pushed with a force of 400N, that is F = 400N. To determine the mass of the object,

First, we will determine the acceleration.

From one of the equations of kinematics for linear motion,

v = u + at

Where v is the final velocity

u is the initial velocity

a is the acceleration

and t is time

We  can write that

v - u = at

Then, a = (v - u) / t

From the question,

t = 8s

v = 24m/s

u = 0 m/s (Since the object was stationary, that is, it was pushed from rest)

∴ a = (24m/s - 0m/s) / 8s

a = 24 / 8 = 3 m/s²

Therefore, acceleration is 3 m/s²

Now,

From F = ma

m = F / a

From the question

F = 400N

∴ m = 400N / 3m/s²

m = 133.33 kg

Hence, the mass of the object is 133.33 kg.  

Answer:

The pressure exerted by the woman on the floor is 1.9061 x 10⁷ N/m²

Explanation:

Given;

mass of the woman, m = 55 kg

diameter of the circular heel, d = 6.0 mm

radius of the heel, r = 3.0 mm = 0.003 m

Cross-sectional area of the heel is given by;

A = πr²

A = π(0.003)²

A = 2.8278 x 10⁻⁵ m²

The weight of the woman is given by;

W = mg

W = 55 x 9.8

W = 539 N

The pressure exerted by the woman on the floor is given by;

P = F / A

P = W / A

P = 539 / (2.8278 x 10⁻⁵ )

P = 1.9061 x 10⁷ N/m²

Therefore, the pressure exerted by the woman on the floor is 1.9061 x 10⁷ N/m²

precisely which regions?

Answer:

Romans have ruled for 450 years

Explanation:

Answer:

length of brass=24cm and length of steel rod=36cm

Answer:

C. the help our understanding of the formation of planetary bodies.

Explanation:

this is the answer of PLATO

Answer:

nothing moves if anything other doesn't move it.

natural position of things is the resting

Explanation:

yeah that's it

Answer:

The book does not move because all the forces acting on the book are in equilibrium, creating a net force of zero magnitude on the book. Since the net force on the book is zero, this means that the book will remain in its present state of motion (which is that the book is motionless).

Explanation:

Newton's first law states that all body will remain in  their present state of motion unless acted upon by an external force. In order word, a moving body should continue moving forever, and a body at rest should remain like that forever, unless they are acted upon by a force to either cause them to stop stop or to start moving respectively.

Answer:

voltage= 17.88volts

current= 0.04 amps

Explanation:

Step one:

given data

resistance R=400 ohms

Power P= 0.8W

a.  What is the maximum voltage that can be applied across this resistor without damaging it?

the expression relating power and voltage is

P=V^2/R

substituting we have

0.8=V^2/400

V^2=0.8*400

V^2=320

V=√320

V=17.88 volts

the maximum voltage is 17.88volts

b.What is the maximum current it can draw?

we know that from Ohm' law

V=IR

17.88=I*400

I=17.88/400

I=0.04amps

Answer:

The electrostatic force will remain the same

Explanation:

From the question we are told that  

     The charge on the each conducting sphere is [tex]q = 2 \ C[/tex]

      The radius each sphere is [tex]r_1 = r_2 = r = 0. 1\ m[/tex]

Generally electrostatic force between the sphere is mathematically represented as

             [tex]F = \frac{k * q_1 q_2 }{d^2}[/tex]

Here  k is the coulomb constant ,

         d  is the distance between the two sphere which is measured from one center of the sphere to the other center of the sphere  

Now from the question we are told that the radius of the spheres is doubled (i.e  from 0.10 m  to 0.2 m ) , this will not affect the distance between the sphere because their center are still in the same position

and given there is no change in the distance between the spheres , the electrostatic force will remain the same

Answer:

A. 1.8x10⁵

Explanation:

For this question we have

72km/h = speed

Total mass = 2250kg

Stopped at t = 0.2250s

To get average force acting on this car on collision:

72km/3.6 = 20m|s

Impulse = ∆p

This implies:

F∆t = m∆v

F = m∆v/∆t

= 2250x20/0.250

= 180000

= 1.8x10⁵

Therefore option A is correct.

Answer:

Special land use basically include all land parcels that cannot be defined in terms of residential and commercial land uses.

Answer:

Applying pesticides

Explanation:

there is a limit on the use of pesticides and it is the only one that is truly applied  water is naturally occuring same with rocks and trees and you are applying things to the soil not the other way around  

Answer:

When elements bond together or when bonds of compounds are broken and form a new substance

Explanation:

Answer:

D

Explanation:

Answer:

weathering

Explanation:

Answer:

0.78m/s^2

Explanation:

using the third equation of motion, the answer is found

v^2=u^2 -2gs

where V= 0 at the maximum point

2gs=u^2

g=u^2

2s

g=2.5^2

2(4)

g=0.78125m/s^2

or g=0.78m/s^2

Answer:

What is the normal force on the object (draw a diagram if needed)

784 N

How much force is required to get the object to start to move from rest (max static friction)?

  470.4 N

When the object starts moving, what is the force of kinetic friction?

274.4 N

If the moving object has a tension force of 300N to the right pulling it, what is the net force on the object in the horizontal direction? 784 N

What is the acceleration (with direction) of the object based on your answer for part d?  Remember that a = net force/m.

Explanation:

We have that for the Question "" it can be said that  the normal force and How much force is required to get the object to start to move from rest is

From the question we are told

An 80 kg object has a µk = 0.35 and a µs = 0.60. Assuming it is on a flat surface

a)

Generally the equation for the Normal Force  is mathematically given as

[tex]F_N=mg\\\\F_N=80*9.8\\\\F_N=784N\\\\[/tex]

b)

[tex]F_{max}=0.60*800\\\\\F_{max}480N\\\\[/tex]

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Complete Question

An 80 kg object has a µk = 0.35 and a µs = 0.60. Assuming it is on a flat surface

Answer: Technology advancement includes the creation of printhead arrays and multiple carriage systems that cover a larger area of cloth in a single pass of the substrate.

Explanation:

Answer:

The answer is below

Explanation:

The speed of the boat in still water is perpendicular to the speed of the water flow. Therefore the speed relative to the ground (V), the speed of flow and the speed of the boat in still water form a right angled triangle. Hence the speed relative to the ground is given as:

V² = 56² + 126²

V² = 19012

V = 137.9 m/s

Answer:

Less than 18000N

Explanation:

Given

[tex]Force\ Exerted = 18000N[/tex]

This question will be answered using Newton's third law.

Understanding this law, it implies that reaction force is equal and opposite to the force exerted.

This implies that;

If the force exerted on the ball is 18000N

the force exerted is -18000N

So, the option that answers the question is less than 18000N because -18000N < 18000N

Answer:

emergencies

Explanation:

This is what I got when I unscrambeled it

i think that would be magnetesium

Answer:

The minimum speed = [tex]\sqrt{\frac{2GM}{R} }[/tex]

Explanation:

The minimum speed that the rocket must have for it to escape into space is called its escape velocity. If the speed is not attained, the gravitational pull of the planet would pull down the rocket back to its surface. Thus the launch would not be successful.

The minimum speed can be determined by;

                      Escape velocity = [tex]\sqrt{\frac{2GM}{R} }[/tex]

where: G is the universal gravitational constant, M is the mass of the planet X, and R is its radius.

If the appropriate values of the variables are substituted into the expression, the value of the minimum speed required can be determined.

The minimum speed that the rocket must have for it to escape into space is  [tex]\sqrt{\frac{2GM}{R} }[/tex].

Escape velocity is the minimum speed that the rocket must have for it to escape into space.

The minimum speed (escape velocity) that the rocket must have for it to escape into space is given as;

[tex]V = \sqrt{\frac{2GM}{R} }[/tex]

where;

Thus, the minimum speed that the rocket must have for it to escape into space is  [tex]\sqrt{\frac{2GM}{R} }[/tex].

Learn more about escape velocity here: https://brainly.com/question/13726115

Answer:

rightwards is the positive velocity

Rightwards is the positive elicitation:

Answer:

3.8

Explanation: