Science 4th Mid

• A constant or a steady acceleration?

  Uniformly Accelerated Motion
• Since acceleration is a vector quantity, uniform acceleration denotes that both magnitude and the direction stay constant?

  Uniformly Accelerated Motion
• Occurs when an object experiences and increase or decrease in velocity at the same rate throughout the motion?

  Uniformly Accelerated Motion
• It is the rate of change in velocity over time?


  Acceleration
• Any motion of an object or body solely influenced by gravity. It means that the effect of air resistance is negligible and has insignificant effect on the falling object?

  Free Fall Motion
• On Earth, free fall is an idealization since there is always some air resistance that will also act on the object or the body?

  Free Fall Motion
• downward direction: negative
• upward direction: positive
• During the 4th Century B.C., Aristotle suggested that heavier bodies fall faster than lighter ones
• Nineteen Centuries later Galileo proposed that all objects experience the same downward acceleration when neglecting the effect of air resistance.
• All objects dropped at the same instant; will all fall at the same time
• He is and Italian physicist and astronomer?

  Galileo Galilei
• He established the concept of relative motion and the discovery of the four of Jupiters moons?

  Galileo Galilei
• He used inclined panes for him to reduce the acceleration and accurately measure?

  Galileo Galilei
• frictional force which opposes the motion of a falling object?

  Air Resistance
• Always opposite to the direction of the object's motion?

  Air resistance
• The faster an object is falling, the higher the air resistance?


  True
• Air Resistance also increases with surface area?


  True