You are fixing the roof of your house when a hammer breaks loose and slides down. The roof makes an angle of 25 with the horizontal, and the hammer is moving at 8.5 m/s when it reaches the edge. Assume that the hammer is moving from the top of the roof to its right edge. What is the horizontal component of the hammer's velocity just as it leaves the roof?

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?