The velocity of a 500-kilogram elevator that has 4,000 joules of energy is 4m/s.
KINETIC ENERGY:
K.E = ½m.v²
Where;
m = mass of the elevator (kg)
v = velocity of the elevator (m/s)
V = √K.E × 2/m
V = √4000 × 2/500
V = √8000/500
V = √16
V = 4m/s
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b. solid
c. liquid
d. plasma
Answer:
plasma
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This other guy said it was plasma
Answer:
Explanation:
* For cylinders, it is unique. Since you have two circular bases, you take half the mass in the formula:
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Answer:
778 J
Explanation:
Rotational energy is:
RE = ½ Iω²
For a solid cylinder I = ½ mr².
Rolling without slipping means ω = v/r.
RE = ½ (½ mr²) (v/r)²
RE = ¼ mv²
Plug in values:
RE = ¼ (34.5 kg) (9.5 m/s)²
RE ≈ 778 J
Round as needed.
Answer:
The correct option is;
C
Explanation:
The given information is that a clay ball is dropped from a certain height.
Therefore, the clay ball has an initial potential energy and zero kinetic energy
Which gives that the initial velocity of the clay ball = 0
As the potential energy is converted into kinetic energy, the velocity of the clay ball increases
However, if the direction of measurement of the velocity is opposite to the direction in which the clay ball is falling, the velocity of the ball progressively increases negatively as shown in option C
A graph of the clay ball velocity from the moment it's dropped until it hits the ground would be a straight line with a negative slope. This is because the velocity increases in the negative direction as the ball accelerates downwards under the force of gravity.
The graph showing the velocity v of a clay ball from when it's dropped until it hits the ground would look like a diagonal line descending from left to right with a negative slope. This is because the moment the clay ball is dropped, it starts accelerating downwards under the force of gravity. Therefore, its velocity increases in the negative direction, making the velocity-time graph a straight line with a negative slope. The slope represents the acceleration due to gravity.
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Explanation:
Atomic number is defined as the total number of protons present in an element.
Each element of the periodic table has different atomic number because each of them have different number of protons.
For example, atomic number of Na is 11, and atomic number of Ca is 20.
On the other hand, atomic mass is the sum of total number of protons and neutrons present in an atom.
For example, atomic mass of nitrogen is 14 that is, it contains 7 protons and 7 neutrons.
Thus, we can conclude that all atoms of the same element must have the same number of protons.
Answer: Protons
Explanation: The number of protons corresponds to the atomic number.
Answer:
The coefficient of friction of the sled is 0.115
Explanation:
It is given that,
Mass of the sled, m = 46.6 kg
Frictional force acting on it, F = 52.9 N
We need to find the coefficient of friction. Frictional force is given by :
So, the coefficient of friction of the sled is 0.115. Hence, this is the required solution.