Physics 201 Assignment on Uniform motion

1. John normally drives on the free way between BB City and SS City at an average speed of 92 km/hr and his trip lasted for 2 hours and 45 minutes. One day, with heavy traffic slows him down and drive the same distance at an average speed of 60 km/hr only. How much longer does the trip take ?

2. A van moves with a constant speed of 6 m/s for 60 seconds, then change gear and moves along at 25 m/s for another 60 seconds. Determine the average speed for the entire 120 s trip.

3. Earthquakes produce several types of shock waves. The most well-known are the P – wave and the S – wave. In the earth’s crust, the P – wave travel at around 6.5 km/s while the S – wave move about 3.5 km/s. Actual speeds vary depending on the type of material they are going through. The time delay between the arrival of these two waves at a seismic recording station tells geologists how far away the earthquake occurred. If the time delay is 33 seconds, how far from the seismic station did the earthquake occur ?

4. Two cyclists start from a common point in the opposite direction with a speed of 15 km/hr and 21 km/hr respectively, one moving east and the other moving to the west. How many minutes will they be 27 km apart? How many How far are they after 1.5 hours?

5. It is now 2:00 PM. At what time before three o’clock will the minute hand and the hour hand become perpendicular for the first time? At what time will the minute hand overtake the hour hand?