6.07 Quiz: Free Fall and Equilibrium
If you drop a penny from a height of 3.0 × 101 m in a vacuum, how long will it take to reach the ground?
2.5 s
If you drop a penny from a height of 3.0 × 101 m in a vacuum, how fast will it be moving when it reaches the ground?
24 m/s
A 90.0 kg skydiver is falling at a constant speed. What is the air resistance force acting on the skydiver?
880 N
Which of these is the best example of free fall?
a baseball thrown directly upward inside a huge tube with air removed from it
When is a real-life object that has been dropped over the side of a tall building closest to being in free fall?
at the start of its fall
A baseball falls over the side of a balloon's gondola. At what point in the baseball's fall has it reached equilibrium?
when its acceleration is zero