Chapter 2 Questions-W18 Q Search in Document Home Insert Design Layout Reference

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Chapter 2 Questions-W18 Q Search in Document Home Insert Design Layout References Mailings Review View Share Calibri (Body) , 13 , A Av A , AaBbCcDdEs Paste Styles Pane Normal No Spacing Heading1 Heading2 Title Subtitle 3) A toy car is moving along a straight track. Its motion is restricted to the positive part of the x-axis. Match the situations described below to one of the acceleration versus time graphs. You may use a graph more than once or not at all. If you think that there is no match, write 'None. In each case, explain your reasoning a. The car speeds up at a steady rate, moving away from the origin. b. The car slows down at a steady rate, moving away from the origin. C. The car moves at a constant speed toward the origin. d. The car speeds up at a steady rate, moving toward the origin. timee I tme tme time e tme Page 4 of 4 349 Words English (US) Focus 120%

Explanation / Answer

(a) The car is speeding up with a steady rate, means its acceleration is constant and it is positive in value.

so correct answer is option (B)

(b) The car slows down at a steady rate. In this case also the acceleration is constant but negative in value.

so correct answer is option (D)

(c) Moving with constant speed means its acceleration is ZERO.

so correct option is (E)

(d) For this part, the acceleration should be constant because here also the car is speeding up at a steady rate. Only direction of motion of the car is changed. So, in my opinion the correct answer should be (B).

In case of any doubt, please write me.  

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