a rock stays in the same position without moving, which law is it ?

The trials where the velocity of the tennis ball is to be determined should be option c. 1 and 4.

It is the quantity of the vector that defined the rate where an object is to be changed the position. Here the person could be imagined and then moved in a rapid way like one step forward and one step back.

So here it should be rolled to the left hand side and it can be stopped after it rolled towards the right hand side.

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Answer:

a

Explanation:

Answer:

it's d. Defense

defense

Explanation:

yes

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Actually Welcome to the Concept of the Force.

Force = Mass * Acceleration.

here, Mass = 45 kg and Force = 65 N

hence, Acceleration = 65/45

===> Acc. = 1.44 m/s^2

hence the acceleration is 1.44 m/s^2

Answer:

0.62 m/s

Explanation:

Given that a model train, travelling at speed , approaching a buffer model train buffer spring

The train, of mass 2.5 kg, is stopped by compressing a spring in the buffer.

After the train has stopped, the energy stored in the spring is 0.48 J.

Calculate the initial speed v of the train

Solution

The total energy stored in the spring will be equal to the kinetic energy of the train.

That is,

1/2fe = 1/2mv^2

Substitutes the spring energy, and mass into the formula

0.48 = 1/2 × 2.5 × V^2

2.5V^2 = 0.96

V^2 = 0.96 / 2.5

V^2 = 0.384

V = sqrt ( 0.384 )

V = 0.62 m/s

Therefore, the initial velocity of the train is 0.62 metres per second.

the pressure exerted by the atmospheric air is called atmospheric pressure

Answer:

1. v₂ = 12.43 m/s

2. I₁ = - 80 N.s

3. I₂ = 80 N.s

Explanation:

Consider the following data given in the question:

m₁ = mass of the Cart 1 = 16 kg

m₂ = mass of the Cart 2 = 7 kg

u₁ = velocity of cart 1 before collision = 4 m/s

u₂ = velocity of cart 2 before collision = 1 m/s

v₁ = velocity of cart 1 after collision = - 1 m/s

v₂ = velocity of cart 2 after collision = ?

1.

Applying the law of conservation of momentum:

[tex]m_{1}u_{1} + m_{2}u_{2} = m_{1}v_{1} + m_{2}v_{2}\\(16\ kg)(4\ m/s)+(7\ kg)(1\ m/s)=(16\ kg)(-1\ m/s)+(7\ kg)(v_{2})\\v_{2} = \frac{87\ kg.m/s}{7\ kg}[/tex]

v₂ = 12.43 m/s

2.

Impulse of cart 1 = I₁ = m₁(v₁ - u₁)

I₁ = (16 kg)(- 1 m/s - 4 m/s)

I₁ = - 80 N.s

3.

Impulse of cart 2 = I₂ = m₂(v₂ - u₂)

I₂ = (7 kg)(12.43 m/s - 1 m/s)

I₂ = 80 N.s

Answer:

Answer: The height of the apple from the ground is at 49552.61071 m or is approximately at 5.0 × 10 m.

Answer:

Sunspots are magnetic in nature. They are the places ("active regions") where the Sun's magnetic field rises up from below the Sun's surface and those magnetic regions poke through. ... Sunspots are formed continuously as the Sun's magnetic field actively moves through the Sun.

Answer:

Decelerating

Explanation:

One arrow is moving it forward but the other arrow is using more force to move it backwards causing it to have a reduction in speed.

Answer:

A

Explanation:

Answer:

Wind turbines are a source of clean renewable energy, but some people who live nearby describe the shadow flicker, the audible sounds and the subaudible sound pressure levels as "annoying." They claim this nuisance negatively impacts their quality of life

Another form of pollution in the farm is called noise pollution

Conclusively, we can say that another form of pollution in the farm is called noise pollution

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Answer:

called optically transparent.

Explanation:

Photons interact with an object by some combination of reflection, absorption and transmission. Some materials, such as plate glass and clean water, transmit much of the light that falls on them and reflect little of it; such materials are

Answer:

Yes it is possible to control to some extent

Explanation:

Yes it is possible to control to some extent. Explanation: In general there are two types of magnets : permanent and temporary (electromagnets). ... On the other hand permanent magnet cannot be switched on and off but the magnetic properties can be altered event to an extent when it loses all its magnetic properties.

Answer:

72.324 J

Explanation:

Formula for gravitational potential energy is given by;

GPE = mgh.

Where;

m = mass

g = acceleration due to gravity

h = height

We are given;

m = 4.1 kg

h = 1.8 m

Thus;

GPE = 4.1 × 9.8 × 1.8 = 72.324 J

Answer:

A: 10 kilometers per hour

B: 4 kilometers per minute

Explanation:

Divide 20 by 2

divide 120 by 30

Answer:

Avg time (s) * Avg velocity (m/s) = Answer (m)

Answer:

The magnitude of the current is 4A (amperes).

Explanation:

We can use [tex]V=IR[/tex], where V stands for Voltage, I stands for current, and R stands for resistance to solve this problem.

A such:

[tex]V=12\\I=\text{ ?}\\R=3\\\\\text{Solve for I}:\\12=3I\\3I=12\\I=\frac{12}{3}\\I=4\text{A}[/tex]

Answer:

1.2

Explanation:

Answer:

move less/slower

Explanation:

Answer:

this is the answer

Explanation:

There are still many factors about life being studied and discovered

Answer:

right

Explanation:

high temperature to low temperature

Answer:

I would have to say B THe su would rise in the west and set in the east But this is just a guess

Answer:

741.333

Explanation:

F = ma

so in order to find mass you must change the equation to

m = F/a

m = 5560/7.5

741.333 = 5560/7.5

Answer:

People have been aware of magnets and magnetism for thousands of years. The earliest records date back to ancient times, particularly in the region of Asia Minor called Magnesia—the name of this region is the source of words like magnet. Magnetic rocks found in Magnesia, which is now part of western Turkey, stimulated interest during ancient times. When humans first discovered magnetic rocks, they likely found that certain parts of these rocks attracted bits of iron or other magnetic rocks more strongly than other parts. These areas are called the poles of a magnet. A magnetic pole is the part of a magnet that exerts the strongest force on other magnets or magnetic material, such as iron. For example, the poles of the bar magnet shown in Figure 20.2 are where the paper clips are concentrated.

A bar magnet with paper clips attached to it.

Figure 20.2 A bar magnet with paper clips attracted to the two poles.

If a bar magnet is suspended so that it rotates freely, one pole of the magnet will always turn toward the north, with the opposite pole facing south. This discovery led to the compass, which is simply a small, elongated magnet mounted so that it can rotate freely. An example of a compass is shown Figure 20.3. The pole of the magnet that orients northward is called the north pole, and the opposite pole of the magnet is called the south pole.

Answer:

Yes, the coil of wire with current passing through it is a magnet.

Explanation:

Answer:

carbon + oxygen → carbon dioxide

Answer:

about 343 metres per second