Q1. Compute Earth's gravitational force on the Shuttle astronauts while orbiting at an altitude of 220 miles (or 354 km) above Earth's surface.
Q2. A child sitting 1.10m from the center of a merry-go-round moves with a speed of 1.24 m/s. calculate the centripetal acceleration of the child, and net horizontal force exerted on the child (mass=25.0kg)