Answer: The force of the engines is 5700N
Explanation:
By the second Newton's law, we have that:
F = m*a
Force equals mass times acceleration.
In this case, we have:
m = 1400kg
a = 3 m/s^2
And the force will be equal to the force of the engines, f, plus the force of the current, -1500 N (because this is pushing you back, so it is in the opposite direction than f), then we have:
F = f - 1500N
Then we have the equation:
f - 1500N = 1400kg*3m/s^2 = 4200N
f - 1500N = 4200N
f = 4200N + 1500N = 5700N
The force of the engines is 5700N
Voltage = current * resistance
Voltage = 12 * 4
Voltage = 48V
Answer: 
Explanation:
We can solve this with the Law of Universal Gravitation and knowing the acceleration due gravity 
of an object above the surface of the planet decreases with the distance (height) of this object from the center of the planet.
Well, according to the law of universal gravitation:
(1)
Where:
is the module of the force exerted between both bodies
is the gravitational constant
is the mass of the Earth
are the mass of each communications satellite
is the distance between the center of the Earth and the satellite
is the radius of the Earth
is the height of the satellite, measured from the Earth's surface
On the other hand, we know according to <u>Newton's 2nd law of motion:</u>
(2)
Combining (1) and (2):
(3)
Isolating :
(4)
Remembering :
(5)
Finally:
Answer: Well the answer is KE = 5.625E-7 i just don't know the units for it...
Hope this helps....... Stay safe and have a Merry Christmas!!!!!!!!!! :D
