Q1. An outfielder throws a 0.150 kg baseball at a speed of 50.0 m/s and an initial angle of 30.0°. What is the kinetic energy of ball at the highest point of its motion?
Q2. A car is driven 110 km west and after that 75 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?
Q3. Assume that a binary star system consists of two stars of equal mass. They are observed to be separated by 310 million kilometres and take 4.0 Earth years to orbit about the point midway between them.