[T] The following problems consider the scalar form of Coulomb’s law, which describes the electrostatic force between two point charges, such as elections. It is given by the equation F ( r ) = k e | q 1 q 2 | r 2 where k e is Coulomb's constant, q i are the magnitudes of the charges of the two particles, and r is the distance between the two particles. 170. [T] Determine the value and units of k given that the mass of the rocket on Earth is 3 million kg. (Hint: The distance from the center of Earth to its surface is 6378 km.)
[T] The following problems consider the scalar form of Coulomb’s law, which describes the electrostatic force between two point charges, such as elections. It is given by the equation F ( r ) = k e | q 1 q 2 | r 2 where k e is Coulomb's constant, q i are the magnitudes of the charges of the two particles, and r is the distance between the two particles. 170. [T] Determine the value and units of k given that the mass of the rocket on Earth is 3 million kg. (Hint: The distance from the center of Earth to its surface is 6378 km.)
[T] The following problems consider the scalar form of Coulomb’s law, which describes the electrostatic force between two point charges, such as elections. It is given by the equation
F
(
r
)
=
k
e
|
q
1
q
2
|
r
2
where keis Coulomb's constant,
q
i
are the magnitudes of the charges of the two particles, and r is the distance between the two particles.
170. [T] Determine the value and units of k given that the mass of the rocket on Earth is 3 million kg. (Hint: The distance from the center of Earth to its surface is 6378 km.)
A hollow steel ball weighing 4 pounds is suspended from a spring. This stretches the spring feet. The ball is started in motion from the equilibrium position with a downward velocity of 4 feet per second. The air resistance (in pounds) of the moving ball numerically equals 4 times its velocity (in
feet per second)
Suppose that after t seconds the ball is y feet below its rest position. Find y in terms of t. (Note that the positive direction is down.)
Take as the gravitational acceleration 32 feet per second per second.
y =
A hollow steel ball weighing 4 pounds is suspended from a spring. This stretches the spring feet. The ball is started in motion from
the equilibrium position with a downward velocity of 8 feet per second. The air resistance (in pounds) of the moving ball numerically
equals 4 times its velocity (in feet per second)
Suppose that aftert seconds the ball is y feet below its rest position. Find y in terms of t. (Note that the positive direction is down.)
Take as the gravitational acceleration 32 feet per second per second.
y =
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