In college softball, the distance from the pitcher's mound to the batter is 43 feet. If the ball leaves the bat at 100mph, how much time elapses between the hit and the ball reaching the pitcher? A ball is thrown vertically upward with a speed of 17 m/s. How ...
During the first 18 minutes of a 1 hour trip, a car has an average speed of 11 m/s. What must the average speed of the car be during the last 42 minutes of the trip be if the car is to have an average speed of 21 m/s for the entire trip?...