1. A GPS tracking device is placed in a police dog to monitor its whereabouts relative to the
police station. At time t = 15 min, the dog's displacement from the station is 1.1 km, 33° north
of east. After a little break, the dog continues to run for 20 min in the direction 75° north of
east for 2.0 km. Find the magnitude and direction of the dog's total displacement. Give the
answer in SI units. What is the dog’s average velocity between these two times?
2. A physics student standing on the edge of a cliff throws a stone vertically downward with an
initial speed of 10.0 m/s. The instant before the stone hits the ground below, it is traveling at a
speed of 30.0 m/s. If the physics student were to throw the rock horizontally outward from the
cliff instead, with the same initial speed of 10.0 m/s, what is the magnitude of the velocity of
the stone just before it hits the ground?
Step by step please!