A 69.0 N object accelerates to the right at 4.5 m/s^2. What is the normal force acting on the object.

Answer:

Be sure to unplug the power source of all electrical equipment before working on it. Always pull from the plug, not the cord. Always wear proper non conductive clothing – insulated gloves, non conductive protective apparel and shoes with insulated soles. Avoid loose clothing or ties.

Answer:

twice more but I have to make it 20 characters so h8 how u doing I hear yelling outside my room and exstasional dread in my head

If the mass of the truck is doubled, the force of friction is doubled, and the skidding distance is doubled.

Hence, the correct option is C.

The skidding distance is proportional to the mass of the truck. If the truck is heavily loaded so it has twice the total mass, the skidding distance will be twice as far.

This is because the force of friction is proportional to the normal force, which is in turn proportional to the mass of the truck. The greater the mass of the truck, the greater the force of friction, and the longer the skidding distance.

In equation form, the skidding distance is given by:

s = μ * d / f

where:

s is the skidding distance

μ is the coefficient of friction

d is the distance traveled before the truck stops

f is the force of friction

The force of friction is given by:

f = μ * mg

where:

m is the mass of the truck

g is the acceleration due to gravity

Therefore, If the mass of the truck is doubled, the force of friction is doubled, and the skidding distance is doubled.

Hence, the correct option is C.

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Answer:

5s

Explanation:

initial distance: 0 m

distance: ? (we don't know)

initial velocity: 0 m/s

velocity: 30 m/s

acceleration: 6 [tex]m/s^{2}[/tex]

time: ? (we are looking for)

v = v0 + at

plug the numbers in:

30 = 0 + 6(t)

= 30 = 6t

= t = 5

5s

Answer:

When cutting, lay the thumb and forefinger flat on the food you are cutting to hold it firmly in position

Explanation:

Because it may cut you so avoid it

Answer:

66 2/3

Explanation:

Answer:

Explanation:

just isolate the m

m= g.r²/G

Answer:

jhon Dalton described it

Explanation:

hope it works out for you

if please mark brainiest

John Dalton described atoms as small spheres that could not be divided into anything smaller.

John Dalton is the scientist who described atoms as small spheres that could not be divided into anything smaller. He proposed his atomic theory in 1803, which included the postulate that all matter is composed of tiny, indivisible particles called atoms. D

Dalton's theory also stated that atoms of different elements are unique in their mass and chemical properties and combine in simple whole-number ratios to form compounds. Dalton's model of the atom was a solid, indivisible sphere that was the smallest possible unit of an element.

While this model has been refined and updated with new discoveries, Dalton's contributions laid the foundation for the modern understanding of atomic structure and chemical reactions.

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Answer:

Explanation:

The correct answer is: Weak nuclear forces are involved when certain types of atoms break down. Strong nuclear forces are responsible for holding atoms together.

Answer: If a velocity time graph is horizontal then the velocity is constant and there is no acceleration.

Answer:

H = Vo t + 1/2 g t^2

Velocity and gravitational acceleration are vector quantities - it is very important to use the correct signs for these quantities to get the correct quantity for H the distance traveled.

Nine elements that have been known since ancient times, and their discovery dates are not precisely recorded are Gold (Au), Silver (Ag), Copper (Cu),  Iron (Fe), Lead (Pb), Tin (Sn), Mercury (Hg),  Sulphur (S) and Carbon (C).

1. Gold (Au): Gold has been used by humans for thousands of years, with evidence of its use dating back to ancient civilizations like the Egyptians, Sumerians, and Indus Valley people.

2. Silver (Ag): Like gold, silver has a long history of human use and has been mined and utilized for various purposes since ancient times.

3. Copper (Cu): Copper is one of the oldest metals known to humans, and its use dates back over 10,000 years. It was one of the first metals to be smelted and used in tools, weapons, and art.

4. Iron (Fe): Iron is another ancient element that has been used for thousands of years. Early civilizations discovered iron in meteorites and later learned to smelt it from iron ores.

5. Lead (Pb): Lead has been known to humans since ancient times and was used by the ancient Egyptians, Greeks, and Romans. It was widely used in plumbing, as well as for making containers and pigments.

6. Tin (Sn): Tin has been used by humans for thousands of years, mainly in the form of an alloy called bronze (copper-tin alloy), which was crucial for the Bronze Age.

7. Mercury (Hg): Mercury has a long history of use in various cultures for medicinal, alchemical, and decorative purposes.

8. Sulphur (S): Sulfur has been used since ancient times for various purposes, including medicine, bleaching, and as a component in sulfuric acid production.

9. Carbon (C): While the element carbon itself has always existed on Earth, the awareness of its presence and significance as an element is ancient.

These elements were used by ancient civilizations for various purposes such as jewelry, tools, construction, and religious rituals. Their discovery dates are lost in antiquity, as they have been known to humans for thousands of years.

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Answer:

50m/s

Explanation:

500/10 to find the velocity always divide

the distance bt the time

El valor de L del tramo rugoso B a C con coeficiente de fricción igual a 0,6, recorrido por el cuerpo de 2 kg cuando se suelta del punto A es 5.00 m.  

El valor de L se puede calcular a partir de la definición de trabajo:

[tex]W = F_{\mu}*d[/tex]  (1)

En donde:

[tex]F_{\mu}[/tex]: es la fuerza aplicada sobre el cuerpo en el tramo de B a C = fuerza de roce = -μN (el signo menos se debe a que está en dirección opuesta a la del movimiento)

μ: es el coeficiente de roce = 0,6

N: es la normal = mg

m: es la masa del cuerpo = 2 kg

g: es la aceleración debida a la gravedad = 9,81 m/s²

d: es la distancia = L =?

Por otra parte, el trabajo también se define como la diferencia de energía mecánica entre los puntos B y C.

[tex] W = E_{C} - E_{B} [/tex]   (2)

Al igualar la ecuación (1) con la (2) tenemos:

[tex]E_{C} - E_{B} = F_{\mu}*d[/tex]   (3)

En el punto C, la energía es cero (0) dado que el cuerpo se detiene y en el punto B la energía que tiene el objeto es la cinética:  

[tex] E_{B} = \frac{1}{2}mv_{B}^{2} [/tex]      

En donde:  

[tex]v_{B}[/tex]: es la velocidad del cuerpo en el punto B

La velocidad del cuerpo en el punto B se puede calcular mediante conservación de energía entre los puntos A y B:

[tex] E_{A} = E_{B} [/tex]          

En el punto A, el cuerpo tiene energía potencial gravitacional, por lo tanto:

[tex] mgh = \frac{1}{2}mv_{B}^{2} [/tex]    (4)

En donde:

h: es la altura = 3 m

Entonces, la velocidad en el punto B es (eq 4):

[tex] v_{B} = \sqrt{\frac{2mgh}{m}} = \sqrt{2*9,81 m/s^{2}*3 m} = 7,67 m/s [/tex]

Ahora, la ecuación (3) queda como sigue:  

[tex] 0 - \frac{1}{2}mv_{B}^{2} = -\mu N*L [/tex]  

[tex] \frac{1}{2}2 kg*(7.67 m/s)^{2} = 0,6*2 kg*9,81 m/s^{2}*L [/tex]  

Resolviendo para L, tenemos:

[tex] L = \frac{\frac{1}{2}2 kg*(7.67 m/s)^{2}}{0,6*2 kg*9,81 m/s^{2}} = 5.00 m [/tex]

Por lo tanto, el valor de L es 5.00 m.

Encuentra más sobre trabajo aqui:

Espero que te sea de utilidad!  

Answer:

ligma

Explanation:

sugondese

Answer:

Distance= 300 km

Displacement= 130

Explanation:

When you find distance you have to add

When you find displacemnet you subtract

If a car drives 215 kilometers west and then 85 kilometers south, then the distance and displacement of the car would be 300 kilometers and kilometers respectively.

Displacement is a vector quantity. This indicates that it has both a direction and a magnitude and that it is visually represented as an arrow that points from the starting position to the ending position.

As given in the problem, if a car drives 215 kilometers west and then 85 kilometers south, then we have to find the distance and displacement of the car,

The distance traveled by car = 215 kilometers + 85 kilometers

                                                = 300 kilometers

The displacement covered by the car = √(215² + 85²)

                                                               = 231.2 Kilometers

Thus, the distance traveled by car would be 300 Kilometers and the displacement would be 231.2 Kilometers in the southwest direction.

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Speed = 342.86 m/s

EXPLANATION

s = v × t/2

600 m = v × 3.5 s/2

600 m × 2 = v × 3.5 s

1200 m = v × 3.5 s

v = 1200 m/3.5 s

v = 342.86 m/s

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The speed of sound in that place  342.86 m/s

The speed of sound is defined as the distance through which a sound wave’s point, such as a compression or a rarefaction, travels per unit of time.

given

distance of cliff= 600 m

time = 3.5 seconds

speed of sound  = ?

distance = speed * time

distance travelled by the sound to come back to the place where the girl was standing will be = 600 * 2 m

speed = distance / time

speed =  600 * 2 m / 3.5 seconds

speed = 1200 / 3.5 = 342.86 m/s

The speed of sound in that place  342.86 m/s

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This question involves the concepts of centripetal force, range of projectile and projectile motion.

The magnitude of centripetal force is "2812.8 N".

First, we will find the velocity of the ball by using the formula of the range of the projectile.

[tex]R = \frac{v^2Sin2\theta}{g}[/tex]

where,

R = range of projectile = 86.75 m

v = speed = ?

θ = launch angle = 47.9°

g = acceleration due to gravity = 9.81 m/s²

Therefore,

[tex]86.75\ m = \frac{(v)^2Sin(2)(47.9^o)}{9.81\ m/s^2}\\\\v = \sqrt{\frac{(86.75\ m)(9.81\ m/s^2)}{Sin95.8^o}}[/tex]

v = 29.25 m/s

Now, we will use the formula to find out the centripetal force:

[tex]F_c = \frac{mv^2}{r}[/tex]

where,

[tex]F_c[/tex] = Centripetal Force = ?

m = mass of the ball = 7.3 kg

v = speed = 29.25 m/s

r = radius = 2.22 m

Therefore,

[tex]F_c = \frac{(7.3\ kg)(29.25\ m/s)^2}{2.22\ m}[/tex]

Fc = 2812.8 N = 2.812 KN

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Answer:

Answer:

the answer would be 2.23

Explanation:

that is also a rounded up decimal! to find your answer, divide the mass (13.8) by the density (6.2) to find your volume :)

Answer:

279 m/s

Explanation:

Answer:

2m/s^2

Explanation:

A=(u-v)/t

where u=final velocity and v=initial velocity and t=time

therefore u =70 and v=0 because the question said velocity of rest and finally t=35

so, (70-0)/35= 70/35=2

Answer:

its B

Explanation:

It's B & A at the same time because A. a roller coaster uses brakes to slow down and stop. B is the most reasonable answer. Because all roller coasters go up and over a second time over the hill, but they also slow down. But go with B.

TELL ME IF I´M RITE

Answer:

Kepler's third law - shows the relationship between the period of an objects orbit and the average distance that it is from the thing it orbits. This can be used (in its general form) for anything naturally orbiting around any other thing.

Formula: P2=ka3 where:

P = period of the orbit, measured in units of time

a = average distance of the object, measured in units of distance

k = constant, which has various values depending upon what the situation is, who P and a are measured.

This is the general form of the formula, so obviously you need at least two of the quantities to find the third. "k" is the trickiest thing since it depends upon the objects that are involved and how you measure "P" and "a". Since "P" can be measured in any unit of time (seconds, days, years, etc), and "a" can be measured in any unit of distance (meters, km, AU), the value of "k" can be quite diverse from one system to another.

There is a simplified version of this law: P2 = a3 where:

The object must be orbiting the Sun

P = period of the orbit in years

a = average distance of the object from the Sun in AU

This version is much more simple, since it has "k" = 1, so it is ignored when those units of measure are used.

Answer:

Uniform motion is defined as the motion, wherein the velocity of the body travelling in a straight line remains the same.

Chuyển động đều là chuyển động mà vận tốc có độ lớn không thay đổi theo thời gian. Chuyển động không đều là chuyển động mà vận tốc có độ lớn thay đổi theo thời gian.

Answer:

the answer should be B

Explanation:

i got it right on edmentum

Answer:

(A)

Explanation:

ITS A ok ok bye