True and False: 4 Points Each Any answers NO T recorded on the Scantron answer p

Question

True and False: 4 Points Each Any answers NO T recorded on the Scantron answer page will NOT be counted. 1·The path of a projectile is hyperbolic in shape A) TrueB) False 2. For an object with a constant acceleration, its average velocity is the same as its instantancous velocity A) True B) False 3. A satellite in a circular orbit around the Earth has a constant acceleration. A) True B) False 4. A vector is a quantity that has both magnitude and direction, while a scalar has only magnitude. A) True B) False 5. The number 0.715 has 3 significant digits A) True B) False 6. Displacement is the same as the distance traveled? A) True B) False 7. The total time of flight used to calculate the range of a projectile is twice the time it takes the projectileto reach its maximum altitude, if the projectile is launched and lands at the same height. A) True B) False For any given initial velocity the maximum Range is achieved when the launching angle is 90° A) True B) False

Explanation / Answer

6.false ( example: if you go and come back the displacment is zero but you have covered a great distance.

7. true ( The time of flight is just double the maximum-height time, the time of maxium height t1/2 = - voy / ay, Time of flight t = 2t1/2 = - 2voy / ay   )

8. False (launching a projectile from ground level, at 45 degrees results in greatest range, launching a projectile, at 90 degrees angle results in the greatest height)

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