5 10 11 12 R i S WFASE S WEE TR & SRS S5 S FEAW LWATSSSW W - Can an object have a northward velocity and a southward acceleration? Explain. Can the velocity of an object be negative when its accel- eration is positive? What about vice versa? If yes, give examples in each case. Give an example where both the velocity and acceleration are negative. Can an object be increasing in speed as its acceleration decreases? If so, give an example. If not, explain. Two cars emerge side by side from a tunnel. Car A is trav- eling with a speed of 60 km/h and has an acceleration of 40 km/h/min. Car B has a speed of 40 km/h and has an acceleration of 60 km/h/min. Which car is passing the other as they come out of the tunnel? Explain your reasoning. A baseball player hits a ball straight up into the air. It leaves the bat with a speed of 120 km/h. In the absence of air resistance, how fast would the ball be traveling when it is caught at the same height above the ground as it left the bat? Explain. As a freely falling object speeds up, what 1s happening to Its accelerationdoes it increase, decrease. or stay the same? (a) Ignore air resistance. (b) Consider air resistance. You travel from point A to point B in a car moving at a constant speed of 70 km/h. Then you travel the same distance from point B to another point C, moving at a constant speed of 90 km/h. Is your average speed for the entire trip from A to C equal to 80 km/h? Explain why or why not