If the position of a car is zero, does its speed have to be zero?. yes no it dep

Question

If the position of a car is zero, does its speed have to be zero?. yes no it depends on the position You drive for 30 minutes at 30 km/h and then for another 30 minutes at 50 km/h. What is your average speed for the whole trip?. more than 40 km/h equal to 40 km/h less than 40 km/h If the velocity of a car is non-zero can the acceleration of the car be zero?. Yes No Depends on the velocity When throwing a ball straight up, which of the following is true about its velocity v and its acceleration a at the highest point in its path?. both v = 0 and a = 0 but a = 0 v = 0 but both and not really sure

Explanation / Answer

1) b, because it may be moving in circular path 2) a 3) a.. because car may be moving with uniform velocity 4) d, because at the highest point the ball will come to rest for a moment

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