Answer with Explanation:
The force of attraction between 2 charges of magnitude separated by a distance 'r' is given by
where
is a constant known as permitivity of free space
Applying the given values in the above relation we get
A car is stopped for a traffic signal. When the light turns green, the car accelerates, increasing its speed from 0 to 5.40 m/s
1 answer:
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Answer:
a) v² = G M R³, b) T = 2π /, c)
Explanation:
a) The kinetic energy is
K = ½ m v²
to find the velocity let's use Newton's second law
F = m a
acceleration is centripetal
a = v² / R
force is the universal force of attraction
F = G m M / r²
we substitute
G m M R² = m v² R
v² = G M R³
the kinetic energy is
K = ½ m G M R³
b) angular and linear velocity are related
v = w R
w = v / R
w =
w =
the angular velocity is related to the period
w = 2π / T
T = 2π / w
we substitute
T = 2π /
c) the angular moeomto is
L = m v r
L = m RA G M R³ R
L =
Answer:
The energy which is expend by the person is .
Explanation:
The formula for the potential energy due to the height of the object is as follows as;
U= mgh
Here, h is the height of the person, m is the mass of the object and g is the acceleration due to gravity.
It is given in the problem that a person is 8850 m above the sea level. 78 kg climber would expend energy against the gravitational force in climbing to the summit from sea level. Here, the person has potential energy as he is above the sea level.
Put h= 8850 m, m= 78 kg and and in the above expression to get the value of energy.
U= (78)(9.8)(8850)
U= 6764940 J
Therefore, the energy which is expend by the person is .