1 at the initial position of motionat the highest point in thetrajectory at the

Question

1 at the initial position of motionat the highest point in thetrajectory     at the final positionof motion velocity and acceleration are neverperpendicular 1 at the initial position of motionat the highest point in thetrajectory     at the final positionof motion velocity and acceleration are neverperpendicular 1 3 at the initial position of motionat the highest point in thetrajectory     at the final positionof motion velocity and acceleration are neverparallel 3 at the initial position of motionat the highest point in thetrajectory     at the final positionof motion velocity and acceleration are neverparallel 3 1 at a higher height at the sameheight     at a lowerheight 1 at a higher height at the sameheight     at a lowerheight 1 1 flight time will be longerflight time will remain thesame     flight time will beshorter 1 flight time will be longerflight time will remain thesame     flight time will beshorter 1

Explanation / Answer

(a)at the highest pointin the trajectory the vertical component is zero, only have horizontal velocity the acceleration is always downward (b)velocity and acceleration are neverparallel to this condition occurred, the object need to don't have thehorizontal component velocity => impossible (c)at a higherheight the gravity acceleration on the Moon is smaller than this on TheEarth. (d)flight time willremain the same the time t only depends on the verticalcomponent velocity

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