Q1. A speed skater moving across frictionless ice at 8.60 {rm m/s} hits the 4.20-m-wide patch of rough ice. She slows steadily, then continues on at 5.30 {rm m/s}. What is her acceleration on the rough ice?
Q2. A helicopter is ascending perpendicularly with a speed of 5.42 m/s. At a height of 146 m above the Earth, a package is dropped from a window. How much time does it take for package to reach the ground?