Practice Quiz

Praxis II General Science

Category - Physics

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A skydiver jumps out of a plane 2 miles above the ground. Assuming air resistance is zero, which of the following is true?
  1. His acceleration through the air is zero.
  2. His velocity will slowly decrease.
  3. His acceleration through the air is constant.
  4. His rate of acceleration is slowly increasing.
  5. The air around him will burn him as he passes quickly through the atmosphere.
Explanation
Answer: C - With no air resistance, his acceleration will be constant, and fixed at the acceleration of gravity. In reality, due to air resistance he will reach a terminal velocity, at which point his acceleration would be zero.
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