Answer:
a) h'= 5/7 h
, b) h ’= h
Explanation:
Let's use energy conservation for this exercise
Starting point. Upper left side
Em₀ = mg h
Final point. Lower left side
Emf = K = ½ m v² + ½ I w²
Em₀ = emf
mgh = ½ m v² + ½ I w²
Angular and linear velocity are related
v = r w
w = v / r
The moment of inertia of the marble that we take as a solid sphere is
I = 2/5 m r²
We substitute
m g h = ½ m v² + ½ 2/5 m r² (v / r)²
g h = ½ v2 (1 + 2/5)
v = √(g h 10/7)
This is the speed at the bottom of the bowl
Now let's apply energy conservation to the right side
a) right side if rubbing
Em₀ = K
Emf = U = mg h’
½ m v² = mg h’
h’= ½ (g h 10/7) / g
h'= 5/7 h
b) right side with rubbing
Em₀ = K
Emf = K + U = -½ I w² + m g h
Emf = -½ 2/5 m r² v² / r² + m gh
Em₀ = emf
½ v² = -1/5 v² + g h’
h’= (1/2 +1/5) (gh 10/7) / g
h ’= h
c) When there is friction, an energy of rotation is accumulated that must be dissipated, by local it goes higher
G=mg
649=10m
m=64,9kg
if we consider the gravitational acceleration 10m/s^2
0.29 m/s is the speed of this wave.
How can we determine a wave's speed?
Given: The wave's traveling wavelength is () = 35 cm
The wave's period (t) is 1.2 seconds.
The wave's frequency is 0.833 Hz.
We must ascertain a wave's wave speed.
Formula for wave speed is 35 x 0.833 (wavelength x frequency).
= 29.167 cm/sec
= 0.29 m/sec
As a result, the wave's speed is 0.29 m/s.
To learn more about wave refer : brainly.com/question/3148541
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Answer:
3600 J
Explanation:
Kinetic energy of an object is the energy posses by an object solely due to its motion.
It can also be defined as the amount of work that can be done when an moving object come to test.
Kinetic energy of an object can be calculated by the equation,
K.E. = ½mv²
Where m = mass, v = velocity
So you get,
K.E. = ½×0.5×(120)² = 3600 J
Answer:
54 kg
Explanation:
Mass of person = 93 kg = 
Mass of water = 62 kg = 
Dividing the above two masses we get
Hence, the mass of the person is 1.5 times the mass of the water in them
Now, Mass of person = 81 kg =
So, the mass of water in a person that has mass of 81 kg is 54 kg
