Answer:
The net upward force the man experiences is approximately 1,324.8 N
The net downward force the man experienced is approximately 556.8 N
Explanation:
The given mass of the man, m = 96 kg
The acceleration of the elevator, a = 4.0 m/s²
According to Newton's third law of motion which states that action ad reaction are equal and opposite, when the elevator moves upwards, we have;
The net force the man experiences, F = Gravitational force, m·g + The force of the elevator pushing upwards, m·a
∴ ↑F = m·g + m·a
Where;
F = The net force the man experiences
m = The mass of the man = 96 kg
g = The acceleration due to gravity ≈ 9.8 m/s²
a = The acceleration of the elevator = 4 m/s²
∴ ↑F = 96 kg × 9.8 m/s² + 96 kg × 4 m/s² ≈ 1,324.8 N
The net upward force the man experiences ≈ 1,324.8 N
When the elevator moves downwards, we have;
The net force the man experiences, F = Gravitational force, m·g + The loss of the gravitational force as the floor moves further downwards, -(m·a)
∴ F = m·g + -(m·a) = m·g - m·a
F = m·g - m·a
∴ ↓F = 96 kg × 9.8 m/s² - 96 k × 4 m/s² ≈ 556.8 N
The net downward force the man experienced ≈ 556.8 N
Joel uses a force of 50 Newtons to hold two weights 0.60 meters above his head. How much work is Joel doing on the weights?
Hurry up.
When a tight fitting lid is run under hot water, the lid _________ as the temperature increases. Question 3 options: Expands Melts Breaks Contracts
Answer:
expands
Explanation:
Empujamos un baúl 3 metros, para ello aplicamos una fuerza de 200 Newton. ¿Cuál es el trabajo realizado?
Answer:
Trabajo realizado = 600 Nm
Explanation:
Dados los siguientes datos;
Fuerza = 200 Newton
Distancia = 3 metros
Para encontrar el trabajo realizado; Trabajo realizado = fuerza * distancia
Sustituyendo en la ecuación, tenemos; Trabajo realizado = 200 * 3
Trabajo realizado = 600 Nm
Does distance play a role in the magnetic field ?
Motion maps for two objects, Y and Z, are shown.
Y →
Z
x
How many seconds does Object Z start before Object Y?
2.
03
04
5
Answer:
i can't see the map plzz send the map
Answer:
its 3
Explanation:
I just took test
Solids, liquids, and gases are very often depicted as groups of particles inside containers of fixed shape and dimension.
Using the simple model of solid, liquid, and gas, which of the following descriptions of physical properties is CORRECT?
A
The physical properties of this phase of matter are that the particles take the shape of the container, do not fill the entire volume, and are very strongly attracted to each other.
B
The physical properties of this phase of matter are that the particles take the shape of the container, do not fill the entire volume, and are strongly attracted to each other.
C
The physical properties of this phase of matter are that the particles take the shape of the container, they fill the entire volume of the container, and are strongly attracted to each other.
D
The physical properties of this phase of matter are that the particles do not take the shape of the container, they fill the entire volume, and are weakly attracted to each other.
Answer:
The answer would be B
Explanation:
Hope you have a good day
Which of the following instruments measures time most accurately?
a. Sundial
b. quartz watch
c. pendulum clock
d. watch with balance wheel
Answer:
b) Quartz Clock
Explanation:
It's is a very type of clock which uses the vibration of quartz crystals to measure time accurately
Why do we need to take care of the surface water/groundwater?
Answer:
sghskm
rohit zimheisbwhx
Please answer this question.
Answer:
150.15 J
Explanation:
From the question given above, the following data were obtained:
Mass (m) = 5 kg
Height (h) = 3 m
Kinetic energy (KE) =?
Next, we shall determine the velocity of the toy before hitting the ground. This can be obtained as follow:
Initial velocity (u) = 0 m/s
Height (h) = 3 m
Acceleration due to gravity (g) = 9.8 m/s²
Final velocity (v) =?
v² = u² + 2gh
v² = 0² + (2 × 10 × 3)
v² = 0 + 60
v² = 60
Take the square root of both side
v = √60
v = 7.75 m/s
Thus, the velocity of the toy before hitting the ground is 7.75 m/s.
Finally, we shall determine the kinetic energy of the toy before hitting the ground. This can be obtained as follow:
Mass (m) = 5 kg
Velocity (v) = 7.75 m/s.
Kinetic energy (KE) =?
KE = ½mv²
KE = ½ × 5 × 7.75²
KE = 2.5 × 60.06
KE = 150.15 J
Thus, the kinetic energy of the toy before hitting the ground is 150.15 J
what physical properties dose plutonium
Answer:
Explanation:
Plutonium-239 is one of the two fissile materials used for the production of nuclear weapons and in some nuclear reactors as a source of energy. The other fissile material is uranium-235. Plutonium-239 is virtually nonexistent in nature. It is made by bombarding uranium-238 with neutrons in a nuclear reactor. Uranium-238 is present in quantity in most reactor fuel; hence plutonium-239 is continuously made in these reactors. Since plutonium-239 can itself be split by neutrons to release energy, plutonium-239 provides a portion of the energy generation in a nuclear reactor.
The gravitational force between two objects in space is 800 million
newtons. If the distance between them is doubled, what size will the
gravitational force be (in millions of newtons)?
A material that does not conduct heat very well
A
Expander
B
Radiation
C
Conductor
D
Insulator
Answer:
D
Explanation:
Insulator is like rubber, it cant physically hold heat well
Explain why a charged body loses its charge if we touch it with our hand?
if u answer me I can give u brainliest ☺️
Answer:
Explanation: A charged body loses its charge when we touch it with our hand because some of the charge flows through our body to the ground earthing. As a result the charge on the body decreases every time we touch it. This is because of earthing.
Explanation:
yw .
Explanation:
When we touch a charged body, it loses its charge, due to the process of earthing. Our body is a good conductor of electricity. It transfers the charges to the earth
how can understanding velocity help to prevent a mid-air collision
Answer:
To maintain enough time to prevent a collision, a system operating in air traffic where aircraft speed does not
fall below 100 km/h (most medium-sized UAVs and GA aircraft) will need to be able to detect obstacles which
subtend an arc-width of as small as 0.125 mra
Gizmo uniform circular motion
How many significant figures does 1740200 have?
Marcus found that the weight of a rock on Earth is 22.5 newtons. He knows that the gravity on Saturn is 0.93 times the gravity on Earth. What would the weight of this rock be on Saturn?
Answer:
The weight of the rock on Saturn would be 21.375
Explanation:
Since the weight on Saturn is 0.93 times the weight on Earth you would multiply 22.5 x0.93. This bring you too 21.375The Escape speed at the surface of a certain planet is twice that of the earth. what is its mass in unit of earth's mass?
Plzz help
Answer:
22Km/sec
Explanation:
Choose the correct words from the box to complete the definition of resistance.
current difficulty ease potential difference
The electrical resistance of a material is a measure of the ______________ of passing a ______________ through it.
Answer:
Opposition of passing a electric circuit
ASAP! AWARDING BRAINLIEST see attached photo.
Answer:d
Explanation:
Answer:
I believe the answer would be B
i dont understand ..............
Take the upward and to-the-right directions to be positive (so down and to-the-left are negative).
The vertical forces acting on the object cancel, 6 N - 6 N = 0.
The horizontal forces exert a net force of 20 N - 3 N = 17 N. This net force is positive, so it points to the right. So the answer is A.
what physical properties dose Neon have?
Answer:
Explanation:
It is a colorless, tasteless odorless inert gas.
It changes to reddish-orange color in vacuum tube.
It is chemically inactive.
It has the lowest liquid range of any element.
Explain
8. How do you know that
the bicyclists in the first
panel above are moving
at a constant velocity?
Answer:
Constant velocity means that the object in motion is moving in a straight line at a constant speed. You know this as in the first panel each arrow representing each second is the same width apart, therefore you know the cyclists are moving at a constant velocity. Compare this to the second box representing changing speed. The arrows are different lengths meaning each second the cyclists are moving at a different speed and are not moving at a constant velocity.
Hope this helped.
DESPERATE WILL GIVE BRAINLIST AND THANKS
Which condition would have resulted from the functions of prokaryotes on early Earth?
Earth's oceans grew larger
less oxygen gas became present in the atmosphere
less carbon became present in Earth's soil
more oxygen gas became present in the atmosphere
Answer: D. more oxygen gas became present in the atmosphere
Explanation:
I just took the test and that was the answer
The asteroid has an estimated mass of 4000 kg and an orbital speed of 10 m/s. Determine the amount of kinetic energy of the asteroid. *
Answer:
40,000J
Explanation:
A certain element has a half-life of 200 years. How much of a 1600 gram sample would be left after 800 years?
2222222×7÷4÷5+6(8×9)
How does an increase in thermal energy affect the kinetic energy of the particles in each state of matter
Explanation:
when there is an increase in thermal energy, the kinetic energy if the matter increases as well.
What is the total energy of a system with KE = 1368 J and a PE = 5782J? Express your answer in kJ.
Answer:
7.150 KJ
Explanation:
The total energy of a system is the sum of the potential and kinetic energy in the system. According to this question, the kinetic energy (KE) = 1368 J and a potential energy (PE) = 5782J.
Total energy of the system will be PE + KE as follows;
1368J + 5782J
= 7150J
However, the question demanded that the answer be in kJ (kilojoules), which is higher than the joules.
Since 1kJ = 1000J
7150J = 7150/1000
= 7.150kJ
If a ball is rolling down a hill, it has both kinetic and potential energy. The ball has
38 J of potential energy because of its height and 80J of kinetic energy because
of its motion. How much mechanical energy does the ball have
The answer is 118 J :)
Explanation:
38 +80 = 118.
BI
Kinetic Energy of a Ball
at a Constant Mass
500
400
Kinetic Energy (m)
300
200
100
0
0 5 10 15 20 25
Speed (meters per second)
10 meters per second, which statement describes the change in kinetic energy of a ball of the same mass thrown
Compared to a ball thrown
at 20 meters per second?
halt (%) the kinetic energy of the ball thrown at 10 meters per
The kinetic energy of the ball thrown at 20 meters per second
second
The kinetic energy of the ball thrown at 20 meters per second is two times (2) the kinetic energy of the ball thrown at 10 meters per
second
The kinetic energy of the ball thrown at 20 meters per second is the same as () the kinetic energy of the ball thrown at 10 meters per
second
The kinetic energy of the ball thrown at 20 meters per second is four times (4) the kinetic energy of the ball thrown at 10 meters per
Second
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3/4/2021
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20 21 22
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Answer: A
Explanation: