A car travels a certain distance along a straight road (in the +x direction). Th

Question

A car travels a certain distance along a straight road (in the +x direction). The distance the car travels as a function of time is shown in the figure below. When the car changes speed it does so uniformly. Select the appropriate choice for each statement: T-True, F-False, G-Greater than, L-Less than, E-Equal to. (If the first is T, the second is G, and the rest E, enter TGEEE).

A) The speed at 73 sec is ..... the speed at 4 sec.

B) The x-acceleration is ..... zero at 36 sec .

C) The x-acceleration is ..... zero at 7 sec .

D) At 73 sec, the speed is as high as it gets.

E) The speed is ..... zero at 26 sec.

Explanation / Answer

A) L - SEE THE SLOPE

B) E - VELOCITY = 0 , ACC = 0

C) E - VELOCITY = CONSTANT, ACC = 0

D)F- AFTER 73 SEC , THE SPEED IS INCREASING

E) E = SLOPE = 0

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