You leave your house and drive to your friend's house, where you stay a while. Then you come back home. Which of the following must be true of your trip? Your instantaneous velocity was never zero. O Your net displacement was not zero. O Your acceleration was constant. O Your average speed was zero. Your average velocity was zero.

A cyclist rides down a long straight road at a velocity (in m/min) given by v(t) = 400 - 20t, for 0≤t≤ 10. a. How far does the cyclist travel in the first 3 min? b. How far does the cyclist travel in the first 10 min? c. How far has the cyclist traveled when his velocity is 350 m/min?

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11. A moderate wind accelerates a pebble over a horizontal ry plane with a constant acceleration â = (5.00 m/s?)î + (5.00 m/s²)j. At time t (4.00m/s)i. What are the (a) magnitude and (b) anggle of its velocity when it has been displaced by 12.0 m parallel to the x axis? 0, the velocity is %3D |3|

Question 6 of 20 Suppose you are driving due east, traveling a distance of 1500 m in 2 minutes. You then turn due north and travel the same distance in the same time. What can be said about the average speeds and the average velocities for the two segments of the trip? O The average speeds and the average velocities are the same. O The average speeds are the same, but the average velocities are different. O The average speeds are different, but the average velocities are the same. 6

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Can an object have a negative acceleration and be speeding up? If so, describe a possible physical situation and a corresponding coordinate system. If not, explain why not.

Please answer the following questions regarding vector and scalar quantities.     Part (a) Which one of the following is a scalar quantity?MultipleChoice   :1) Velocity.2) All of the choices.3) Time.4) None of the choices.5) Acceleration. 6) Displacement. Part (b) What information do vector quantities convey?MultipleChoice   :1) Sign and Direction.2) Direction Only.3) Magnitude and Direction.4) Sign Only.5) Magnitude Only.6) Magnitude and SignPart (c) Which one of the following is a vector quantity?MultipleChoice   :1) Mass.2) All of the choices.3) Displacement.4) None of the choices.5) Temperature. 6) Distance.