Determine the acceleration of a boat with a final speed of 120 m/s after 30 seconds.

Answer:

I'd imagine fast food is a lot more popular than most countries over there and easier to get hold of.

Explanation:

america

Answer:

There are different answers to that, like if you read a passage or something.

Explanation:

These days many people do not get exercise. A lot of jobs are now done indoors and do not require any physical activities. Technology is becoming more advanced and many people prefer using machines to do the heaving lifting.

There are a lot of fast-food restaurants and this is where a lot of people in the US choose to eat. The food is cheap and easy to pick up. This food is convenient for people on the go. The food is not healthy and it causes weight gain.

In the US, many young children find it cool to smoke. Smoking decreases the body's strength and it causes a decrease in physical health, causing people to gain weight.

Everyone has a phone these days, if not some kind of electronic device to chat with people or play games. Over time, playing on electronic devices replaces doing physical activities.

Machine weights are safer when used correctly, but free weights can be dropped and cause injury. These are safety considerations to keep in mind whether using free weights or machine weights. But because they aren't big, complicated machinery, free weights are less expensive.

Resistance machines and free weights are very different from one another in terms of how they work and the results they can create.

Machines are set in place and can only move in a few directions, whereas free weights can be moved in whatever direction the user selects. This is the main distinction between machines and free weights. Free weights require you to utilize more stabilizing muscles to control them, whereas resistance machines help you by stabilizing you while you move.

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Given:

Initial velocity (u) = 10 m/s

Acceleration (a) = 50 m/s²

Time taken (t) = 3 s

To Find:

Final velocity (v)

Answer:

By using equation of motion, we get:

[tex] \bf \longrightarrow v = u + at \\ \\ \rm \longrightarrow v = 10 + 50 \times 3 \\ \\ \rm \longrightarrow v = 10 + 150 \\ \\ \rm \longrightarrow v = 160 \: m {s}^{ - 1} [/tex]

[tex] \therefore [/tex] Final velocity (v) = 160 m/s

Answer:

It's -6 meters/seconds.

Explanation:

Answer:

-6

Explanation:

Answer:

A is answer

Explanation:

this is helpful

Answer:

run

Explanation:

run - less wet

walking - more wet

Answer:

Force is the action exerted on a body of mass to move from one palce to another or to change position

While distance is a measure of how far and object has travelled from its starting point, or how far away it is OR Distance is a measure of seperation between two points

Explanation:

The relationship between them both is MOTION .......thats what I think

♥️✌❤✌

Answer: KE= 1/2 m v^2

KE= 1/2 2500 (0)^2

KE= 0

Explanation: since initial velocity is 0, the KE is 0.

The initial kinetic energy, in [J], of car 1 is 0.

KE= 1/2 m v^2

KE= 1/2 2500 (0)^2

KE= 0

Kinetic energy is a form of energy that an object or a particle has by means of reason of its movement. If paintings, which transfer strength, are carried out on an object via making use of an internet pressure, the object hastens and thereby gains kinetic energy.

The kinetic strength of an object depends on its velocity. To trade its pace, one must exert pressure on it. It turns out there's a connection between the pressure one applies to an object and the resulting change in its kinetic electricity: KE(very last) - KE(initial) = (force) (distance)

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Answer:

If a piece of iron is brought near a permanent magnet, the electrons within the atoms in the iron orient their spins to match the magnetic field force produced by the permanent magnet, and the iron becomes “magnetized.”

Explanation:

i dont know how to add align and domain

Answer:

Motion is a powerful  experience

Motion brings out the best in people

Motion can flow like oceans

Explanation:

Answer:

20N

Explanation:

Given parameters:

Mass of the block  = 4kg

Acceleration  = 5m/s²

Unknown:

Horizontal force needed to accelerate the block  = ?

Solution:

According to Newton's second law of motion;

     Force  = mass x acceleration

Now insert the parameters and solve;

        Horizontal force  = 4 x 5  = 20N

Answer:

Explanation:

Using the efficiency formula;

Efficiency = Work done by the machine (output)/work done on the machine (input) ×100%

Efficiency =w/50 ×100

90 = 100w/50

Cross multiply

90×50 = 100W

4500 = 100W

W = 4500/100

W = 45Joules

Hence the lever does 45Joules of work on its load

2) Mechanical Advantage= Load/Effort

Given

MA = 4

Load = 500N

4 = 500/Effort

Effort = 500/4

Effort =125N

Hence the effort required to lift the load is 125N

1. The work done by the lever on its load is 45 J

2. The force needed to exert to lift the load is 125 N.

1. Determination of the work done by the lever on the load.

Work Input = 50 J

Efficiency = 90%

[tex]efficiency \: = \frac{work \: output}{work \: input} \times 100 \\ \\ 90\% = \frac{work \: output}{50} \\ \\ cross \: multiply \\ \\ work \: output \: = 90\% \: \times 50 \\ \\ work \: output = 0.9 \: \times 50[/tex]

Therefore, the work done by the lever on the load is 45 J

2. Determination of the force needed to lift the load

Mechanical advantage (MA) = 4

Load (L) = 500 N

[tex]mechanical \: advantage \: = \frac{load}{effot} \\ \\ 4 \: = \frac{500}{effort} \\ \\ cross \: multiply \\ \\ 4 \: \times effort \: = 500 \\ \\ divide \: both \: side \: by \: 4 \\ \\ effort \: = \frac{500}{4} \\ [/tex]

Therefore, the force needed to lift the load is 125 N

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Answer:

[tex]57.24^{\circ}[/tex]

24.21 m/s

Explanation:

x = Displacement in x direction = 55 m

y = Displacement in x direction = 0

[tex]y_0[/tex] = Height of the ball when the ball is kicked = 1 m

t = Time taken = 4.2 s

[tex]a_y=g[/tex] = Acceleration due to gravity = [tex]-9.81\ \text{m/s}^2[/tex]

u = Initial velocity of ball

Displacement in x direction is given by

[tex]x=u_xt+\dfrac{1}{2}a_xt^2\\\Rightarrow 55=4.2u_x+0\\\Rightarrow u_x=\dfrac{55}{4.2}\\\Rightarrow u\cos\theta=13.1\ \text{m/s}\\\Rightarrow u=\dfrac{13.1}{\cos\theta}[/tex]

Displacement in y direction is given by

[tex]y=y_0+u_yt+\dfrac{1}{2}a_yt^2\\\Rightarrow 0=1+4.2u\sin\theta+\dfrac{1}{2}\times (-9.81)\times 4.2^2\\\Rightarrow 0=4.2u\sin\theta-85.5242\\\Rightarrow u\sin\theta=20.36\ \text{m/s}\\\Rightarrow u=\dfrac{20.36}{\sin\theta}[/tex]

[tex]\dfrac{13.1}{\cos\theta}=\dfrac{20.36}{\sin\theta}\\\Rightarrow \dfrac{20.36}{13.1}=\dfrac{\sin\theta}{\cos\theta}\\\Rightarrow \theta=\tan^{-1}\dfrac{20.36}{13.1}\\\Rightarrow \theta=57.24^{\circ}[/tex]

The ball should be kicked at an angle of [tex]57.24^{\circ}[/tex]

[tex]u=\dfrac{13.1}{\cos\theta}=\dfrac{13.1}{\cos57.24^{\circ}}\\\Rightarrow u=24.21\ \text{m/s}[/tex]

The initial speed of the ball is 24.21 m/s.

The number of unknowns in the question are two therefore two equations

are required to find a solution.

Part A: The angle at which the ball should be kicked is approximately 57.56°

Part B: The initial speed with which the ball should be kicked is approximately 24.41 m/s.

Reasons:

The given parameters are;

Time the ball should be in the air = 4.2 s

Point the ball should land, d = 5.5 m from where it was kicked

Height at which the ball leaves the ground = 1.0 m

Part A;

The angle at which the ball should be kicked.

Solution;

The horizontal distance, d = uₓ·t

Therefore;

[tex]u_x = \dfrac{d}{t} = \dfrac{5.5}{4.2} = \dfrac{55}{42}[/tex]

[tex]u_x = u \cdot cos(\theta)= \dfrac{55}{4.2}[/tex]

Where;

u = The initial velocity

[tex]Vertical \ motion , \ h =\mathbf{h_0 + u_y\cdot t - \dfrac{1}{2} \cdot g \cdot t^2}[/tex]

Which gives;

[tex]0 =1 + u_y\times 4.2 - \dfrac{1}{2} \times 9.81 \times 4.2^2 = 4.2\cdot u_y - 86.5242[/tex]

[tex]u_y =u \cdot sin(\theta) = \dfrac{86.5242}{4.2} = 20.601[/tex]

[tex]\dfrac{u_y}{u_x} =\dfrac{20.601}{\left(\dfrac{55}{4.2} \right)} = \mathbf{ \dfrac{u \cdot sin(\theta)}{u \cdot cos(\theta)}} = tan\left( \theta)[/tex]

[tex]\mathrm{The \ angle \ at \ which \ the \ ball \ should \ kicked } \ \theta = arctan \left(\dfrac{20.601}{\left(\dfrac{55}{4.2} \right)} \right) \approx \underline {57.56 ^{\circ}}[/tex]

Part B

[tex]u \cdot cos(\theta)= \dfrac{55}{4.2}[/tex]

[tex]The \ initial \ speed, \ u= \dfrac{55}{4.2 \times cos(57.56^{\circ })} \approx 24.41[/tex]

The initial speed of the ball, u ≈ 24.41 m/s

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Answer: You can easily find out the beginning point of the line by using dot representation. When it comes to position vector, it expresses the exact position of certain object from the starting point of the coordinate system. The vector is a straight line that has a certain end which is fixed to its body.

brainliest please :)

Answer:

We can easily find out the beginning point of the line by using dot representation. When it comes to the position vector, it expresses the exact position of a certain object from the starting point of the coordinate system. The vector is a straight line that has a certain end that is fixed to its body.

Answer:

d

Explanation:

Answer: It moves in the direction of Fb at a constant rate of speed, because the same amount of force is being added the whole time.

Explanation:

Answer:

C3N6 is also known as propene(Meythlethylene)

Explanation:

Propene has 3 Carbon molecules and 6 nitrogen molecules. This makes the new substance a non-metal.

The formula for kinetic energy is 1/2 mv2. The kinetic energy is 0.40 m/s2.

Kinetic energy, which can be seen in the movement of an object or subatomic particle, is the energy of motion. Kinetic energy is present in every particle and moving object.

Examples of kinetic energy in action include a person walking, a baseball soaring through the air, a piece of food falling from a table, and a charged particle in an electric field. An object has no kinetic energy if it is not moving.

Potential energy is present in stationary objects (the other main type of energy). When an object is propelled into motion by a force like gravity, its potential energy is transformed into kinetic energy.

Therefore, The formula for kinetic energy is 1/2 mv2. The kinetic energy is 0.40 m/s2.

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Answer:

newtons law of force

newtons law of force explains that something may or can or canot move depending on the objexts mass.

Answer:

Thomson

Explanation:

Thomson in 1904 soon after the discovery of the electron, but before the discovery of the atomic nucleus, the model tried to explain two properties of atoms then known: that electrons are negatively-charged particles and that atoms have no net electric charge.

Answer:

Explanation:

Power is a measure of the amount of work that can be done in a given amount of time. Power equals work (J) divided by time (s). The SI unit for power is the watt (W), which equals 1 joule of work per second (J/s). Power may be measured in a unit called the horsepower.

Answer:

6.0 N

Explanation:

The strength of a force is expressed as the magnitude of the force in Newton.

The formula to apply here is :

Force= mass * acceleration

F=ma

Mass, m = 4 kg

Acceleration = 1.5 m/s²

Force= 4 *1.5 = 6.0 N

Answer:

D carries water from the roots to the leaves.

is the answer.

Explanation:

Xylem is the specialised tissue of vascular plants that transports water and nutrients from the plant–soil interface to stems and leaves, and provides mechanical support and storage.

Answer:

D carries water from the roots to the leaves

Explanation:

have a nice day

Answer:

Scientists use many skills as they investigate the world around them. They make observations by gathering information with

their senses. Some observations are simple. For example, a simple observation would be figuring out the color or texture of

an object. However, if scientists want to know more about a substance, they may need to take measurements.

Measurement is perhaps one of the most fundamental concepts in science. Without the ability to measure, it would be

difficult for scientists to conduct experiments or form theories. Not only is measurement important in science and the

chemical industry, it is also essential in farming, engineering, construction, manufacturing, commerce, and numerous

other occupations and activities.

The word “measurement” comes from the Greek word “metron,” which means “limited proportion.” Measurement is a

technique in which properties of an object are determined by comparing them to a standard.

Measurements require tools and provide scientists with a quantity. A quantity describes how much of something there is or

how many there are. A good example of measurement is using a ruler to find the length of an object. The object is

whatever you are measuring, the property you are trying to determine is the object’s length, and the standard you are

comparing the object’s length to is the ruler.

In general, scientists use a system of measurement still commonly referred to as the “metric system.” The metric system

was developed in France in the 1790s and was the first standardized system of measurement. Before that time, people

used a variety of measurement systems.

In 1960, the metric system was revised, simplified, and renamed the Système International d’Unites (International

System of Units) or SI system (meters, kilograms, etc.). This system is the standard form of measurement in almost

every country around the world, except for the United States, which uses the U.S. customary units system (inches,

quarts, etc.). The SI system is, however, the standard system used by scientists worldwide, including those in the

United States.

There are several properties of matter that scientists need to measure, but the most common properties are length and mass.

Length is a measure of how long an object is, and mass is a measure of how much matter is in an object. Mass and length

are classified as base units, meaning that they are independent of all other units. In the SI system, each unit of measure has

a base unit.

Explanation:

Some things scientists want to measure may be very large or very small. The SI, or metric, system is based on the

principle that all quantities of a measured property have the same units, allowing scientists to easily convert large and

small numbers. To work with such large or small numbers, scientists use metric prefixes. Prefixes can be added to base

units and make the value of the unit larger or smaller. For example, all masses are measured in grams, but adding

prefixes, such as milli- or kilo-, alters the amount. Measuring a human’s mass in grams would not make much sense

because the measurement would be such a large number. Instead, scientists use kilograms because it is easier to write

and say that a human has a mass of 90 kilograms than a mass of 90,000 grams. Likewise, one kilometer is 1,000 meters,

while one millimeter is 0.001 meters. The table below lists some common prefixes and the quantities they represent.

Answer:

3.33 m/s

Explanation:

time = 20 minutes = 20 x 60 = 120 seconds

distance = 400m

speed = distance/time

           = 400/120

           = 40/12

           = 10/3

           = 3.33m/s

Answer:

All objects emit and absorb infrared radiation. The hotter an object is the more energy it radiates per second. Infrared radiation can travel through a vacuum. When infrared radiation hits an object some of the energy is absorbed, making the objects temperature increase, and some is reflected.

Explanation:

Answer:

10:30am ........................

Answer:

maybe around 10:30 I would say