Answer:
A. Balanced forces do not cause a change in motion.
Explanation:
Forces on an object defines how it moves. Forces affect the motion of an object. Forces might slow the speed of an object or make it move faster. It might change the direction of motion of the object. But not always.
Balanced Forces:
When multiple forces are acting on an object but their sum is equal to zero or they cancel out each other.
Net Force = 0
Unbalanced Forces:
When multiple forces are acting upon an object and they are not balanced, they will cause a change in the motion of the object.
Newton's First Law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. This law reinforces our statement that "balanced forces do not cause a change in motion."
Do gravity always cause a change in motion?
Consider an object in air or rolling down a steep surface. Also consider a book placed on a table.
Gravity is acting upon the objects in both cases. The difference is that there is a normal force on the book placed on the table which is balancing the gravitational force. Thus the forces are balanced and there is no change in motion. However, no forces are there to balance the gravitational force acting upon a falling object and thus it gains acceleration.
Answer:
The Electron
Explanation:
Electrons are how some atoms let electricity flow easily. If have closely bound electrons, then they are a bad conductor, or insulator. Atoms with loosely bound electrons allow electricity to easily flow, making these types of atoms great conductors. This is the case with most metals, where their electrons are very loose, making metals, like copper, great at transmitting electricity.
current . . . flow of electric charges
voltage . . . stored potential energy at the source of a circuit
resistance . . . opposition to the flow of electric current
arrowRight . . . a button on the computer keyboard that causes the cursor to move to the right on the screen when pushed
arrowRight . . . a button on the computer keyboard that causes the cursor to move to the right on the screen when pushed
arrowRight . . . a button on the computer keyboard that causes the cursor to move to the right on the screen when pushed
T1=S/V1T2=Ttot-T1=(2S/Vtot)-S/V1V2=S/T2 = S / (2S/Vtot-S/V1)Simplify in V2 = V1Vtot/(2V1-Vtot) = 48 * 90 / 6 = 720 km/hr