Imagine Two Artificial Satellites Orbiting Earth At The Same Distance. One Satellite Has A Greater Mass Than The Other One? Whic
h Of The Following Would Be True About Their Motion?A.The satellite with the greater mass is being pulled toward Earth w/ less of a force than the other satelliteB.The satellite w/ the greater mass is being pulled toward Earth w/ a greater force than the otherC.The two satellites are being pulled equal force by the moonD.The two satellites are being pulled toward Earth w/ equal forceImagine Two Artificial Satellites w/ Equal Masses Orbiting Earth. One Satellite Is Orbiting Closer To Earth Than The Other Satellite. Which Of The Following Would Be True About Their Motions?A.The satellite closer to Earth will be pulled toward Earth w/ the same gravitational pull as the other satellite B.The satellite closer to Earth will be pulled toward Earth w/ less gravitational pull than the other satellite C.Both satellites will be pulled w/ equal force toward the moonD.The satellite closer to Earth will be pulled toward Earth w/ more gravitational pull than the other satelliteHow Will Resistance Change When The Voltage Increases In A Electric Circuit If The Current Remains Constant?A.It will decrease B.It will stay the sameC.It will increase D.It will decrease,then increase
After reading this whole question, I feel like I've already earned 5 points !
-- Two satellites at the same distance, different masses:
The forces of gravity between two objects are directly proportional to the product of the objects' masses. In other words, the gravitational forces between the Earth and an object on its surface are proportional to the mass of the object. In other words, people with more mass weigh more on the Earth, and the Earth weighs more on them.
If the satellites are both at the same distance from Earth, then the Earth pulls on the one with more mass with greater force, and also the one with more mass pulls on the Earth with greater force.
-- Two satellites with the same mass, at different distances:
The forces of gravity between two objects are inversely proportional to the square of the distance between them. In other words, the gravitational
forces between the Earth and an object are inversely proportional
to the square of the distance between the object and the center of the Earth.
If
the satellites both have the same mass, then the Earth
pulls on the nearer one with greater force, and also the nearer one pulls on the Earth with greater force.
-- Resistor in a circuit when the voltage changes:
The resistance depends on how the resistor was manufactured. Its resistance is marked on it, and doesn't change. It remains the same whether the voltage changes, the current changes, the time of day changes, the cost of oil changes, etc.
If you increase the voltage in the circuit where that resistor is installed, the current through the resistor increases. If the current remains constant, then you can be sure that somebody snuck over to your circuit when you weren't looking, and they either installed another resistor in series with the original one to make the total resistance bigger, or else they snipped the original one out of the circuit and quickly connected one with more resistance in its place.
Solution: To find a, divide the force by the weight
A = F ÷ m
= 45 ÷ 150
= 0.3 m/s²
Newtons are derived units, equal to 1 kg-m/s². In other words, a single Newton is equal to the force needed to accelerate one kilogram one meter per second squared.
As we progress and learn more, scientists make new discoveries that can contradict earlier discoveries, and since are technology is better today we are able to discover a lot more to add to or change our previous theories.
Since velocity vector has 2 components: direction and magnitude, and speed is the velocity's magnitude. So if the velocity doesn't change its direction, we essentially use its magnitude, aka speed, to calculate the rate of change for acceleration.
