Which of the following are true, regarding motion? Select all that are True . A.

Question

Which of the following are true, regarding motion?
Select all that are True.

A. If you travel at 70 mi/hr from Fargo to Minneapolis, MN, and then return to Fargo at the same speed, your average velocity for the trip is zero.
B. When a ball thrown upward reaches its highest point, its acceleration is zero.
C. If the slope of a plot of velocity versus time has a constant negative value, the object must be slowing down.
D. If the slope of a plot of position versus time is changing, the object is undergoing acceleration.
E. If a feather and a lead ball are dropped from the same height at the same time in vacuum, they will hit the ground at the same time.E.If the slope of a plot of velocity versus time is constant, the object cannot be moving.

F. a plot of velocity versus time is constant, the pbject cannot be moving.

Explanation / Answer

A.   displacemnet zero, so average velcoity zero - True

B. acc. is always g.   - False

C. slope is acc. and acc. is negative but if plot is above z-axis . but not in lower part.
- False

D. Yes

e. True

E. False

F. False

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