What is the kinetic energy of a 1.0-kg ball moving at 3.0 m/s?
Answers
= (1/2)*1*3² = 0.5 *1 * 9 = 4.5
Kinetic Energy = 4.5 Joules
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Which of the following accurately describes properties of valence? A. The greater the number of electrons an atom has to borrow or to lend, the greater the activity of the atom. B. Metals tend to have a negative valence and tend to be electron borrowers. C. Nonmetallic elements tend to have a positive valence and tend to be electron borrowers. D. The smaller the number of electrons an atom has to borrow or to lend, the greater the activity of the atom.
The Royal Gorge bridge over the Arkansas River is 393 m above the river. A bungee jumper of mass 150 kg has an elastic cord of length 78 m attached to her feet. Assume the cord acts like a spring of force constant k. The jumper leaps, barely touches the water, and after numerous ups and downs comes to rest at a height h above the water. The acceleration of gravity is 9.81 m/s². Find h. Answer in units of m.
Answers
The speed of the object at its' final location is; 38 m/s
What is work energy theorem?
For the first force, we are given;
Force; F₁ = 220i + 320j - 120k
Initial Position; r₁ = 13i - 19j - 3k
Final Position; r₂ = 18i - 11j - 8k
Thus; Displacement; Δr = r₂ - r₁
Δr = 18i - 11j - 8k - (13i - 19j - 3k)
Δr = 5i + 8j - 5k
From work energy theorem, we know that;
F₁ * Δr = ¹/₂m(v₂² - v₁²)
We are given v₁ = 2.5 m/s and m = 60 kg. Thus;
(220i + 320j - 120k) × (5i + 8j - 5k) = ¹/₂ * 60(v₂² - 3.5²)
4260/30 = v₂² - 3.5²
1420 = v₂² - 12.25
Solving gives v₂ = 37.85 m/s
For the second force, we are given;
Force; F₂ = 150i + 230j - 220k
Initial Position; r₁ = 18i - 11j - 8k
Final Position; r₂ = 22i - 17j - 3k
Thus; Displacement; Δr = r₂ - r₁
Δr = 22i - 17j - 3k - (18i - 11j - 8k)
Δr = 4i - 6j + 5k
From work energy theorem, we know that;
F₂ * Δr = ¹/₂m(v₂² - v₁²)
Now, v₁ = 37.85 m/s and m = 60 kg. Thus;
(150i + 230j + 220k) × (4i - 6j + 5k) = ¹/₂ * 60(v₂² - 37.85²)
320/30 = v₂² - 37.85²
10.67 = v₂² - 1,432.6225
Solving gives v₂ = 38 m/s
Read more about Work Energy theorem at; brainly.com/question/14468674
(220, 320, -120).(18-13,-11+19,-8+3) +(150, 230, 220).(22-18,-17+11,-3+8)= 1/2 *60*(V^2- 3.5^2)
220*5+320*8+ -120*-5 + 150*4 + 230* 6 +220* -5= ..
simplify his
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wave B
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wave A + B
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A. Destructive interference
B. Diffraction subtraction
C. Diffraction gradient
D. Constructive interference
Answers
Answer: Constructive interference
Explanation: Just took the test
Final answer:
The diagram shows destructive interference between two waves, resulting in a smaller amplitude wave.
Explanation:
The type of wave interaction shown in the diagram is destructive interference.
In destructive interference, two waves combine and create a new wave with a smaller amplitude. This occurs when the crests of one wave align with the troughs of another wave, causing cancellation.
In the diagram, wave A and wave B are out of phase, meaning their crests and troughs do not align. When they combine, the resulting wave has a smaller amplitude than either individual wave, indicating destructive interference.
Learn more about Destructive interference here:
#SPJ2
Answers
Answer: Momentum is mass times velocity (P = m*v)
Explanation: Momentum is defined as the "amount of movement"
The momentum of an object moving can be calculated as:
P = m*v
where P is momentum
m is the mass of the object
v is the velocity of the object.
Notice that momentum has a given direction (the same of the velocity) so it is a vector.
Momentum is mass times velocity
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Answer:
Explanation:
First of all, we can find the work done as follows:
where P is the power and t is the time taken. In this problem, and
, so the work done is
The work done is equal to the force applied F times the displacement d:
since we know d=20.0 meters, we can re-arrange the equation to find the force exerted:
Answer:
C) 1.4 × 105 newtons
Explanation:
Correct answer on plato/edmentum
Answers
x = 82.93 m
Nothing to deal with physics.
Maths. Scale factor. Year 9.
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Answer:
Explanation:
If the magnet is dropped from this position, then the direction of the induced current in the coil would be anticlockwise. Lenz's law allows us to predict the direction of the induced current in a circuit. It is also known as the Right hand rule. It states that the current that is being induced in a particular circuit is as a result of the change in the magnetic field in order to oppose the change in the magnetic flux and also to apply an mechanical force that is opposing the motion. Because of this, the current is pointed to the direction of the pole, to oppose this the induced current should be directed anticlockwise.