a cylinder of mass 34.5 kg rolls without slipping on a horizontal surface. At a certain instant, its center of mass has a speed 9.5 m/s. Determine the rotational kinetic energy
Answers
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.
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4.00 m/s
0.400 m/s
0.0400 m/s
I will report you if you give a cruddy answer - please explain!
Answers
Okay so we need to bring a couple of equations into this
First E =F/q
We have our q and E lets solve for F
F = Eq
So remember th equation
F = qV x B
F = qVBsin(Ф)
The angle is perpendicular so
sin(90) = 1
F = qVB
Solve for V
F/qB = V
Eq/qB = V
Look at that the charges cancel out!
V = E/B
(Fun fact: Thats what they use in mass spectrometers which is why it says the particle should travel in a straight line)
Anyways lets solve this!
V = 2/5
V = 0.4 m/s
there are 2 forces acting on the particle: magnetic n electric force
the 2 forces must be equal 4 it to travel in a straight line
as it has +1C charge, q, the charge is dropped in the following:
magnetic force = qv x B where v is velocity n B is magnetic field;
x represents cross-product which in this case of 90-deg. is same as multiply
magnet force = v*5
electric force = qE where E is electric field
= 2
as magnet force = electric force
v*5 = 2
v=2/5=0.400m/s
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Answer: The Rate constant is 1.209
Explanation:
in the attachment
Explanation:
Below is an attachment containing the solution.
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There are numerous ways of adjusting the forehand stroke and variations are allowed.
Answer:
false
Explanation:
The forehand stroke is a basic shot in tennis, variations are allowed in order to boost performance (power, topspin and accuracy) of the player. Some guidelines to choose the correct forehand stroke are to visualize the correct stroke, position correctly, correct footwork and selecting shot location.
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Answer:
Gamma > Beta > Alpha
Explanation:
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Explanation:
Alfred Wegener was a meteorologist and geologist. He was inspired by a map of continents to start the journey of explaining Earth's geological history. He gave the theory of continental drift which says that the continents of Earth have moved relative to each other over time. He used following evidences to support his theory:
1. The facing side of South America's and Africa's shoreline interlocks perfectly. Which implies they must have been joined together in history.
2. Fossil of same type of reptiles found on different continents separated by huge oceans.
3. Matching the rock pieces on either side of the Atlantic oceans.
Answer: The correct answer is: coastline fits between different continents, similar rocks and fossils on different continents
Explanation: I took the test