Download HW#6: Fallin` Up

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HW#6
Reading: Gravity and Motion
Fallin’ up
Please answer in complete sentences.
1) Galileo figured out that all objects fall toward the earth at the same rate regardless
of their mass. In fact, all objects accelerate toward the Earth at a rate of 9.8
meters per second every second.
What is one factor that could affect the acceleration of an object towards Earth?
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2) What is projectile motion and when does it occur? Draw a picture if that helps
you to explain. Remember to label the drawing.
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3) How is an orbiting space shuttle an example of projectile motion? (Hint: Explain
the horizontal and vertical force.)
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4) What is free fall?
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http://www.darkstudios.com/c2c/drop.jpg
5) Think about Drop Zone, the amusement park ride at Great America. Riders are
strapped to a seat and raised up to the top of the tower. Then after a brief
moment, the riders are dropped from the tower and allowed to fall toward the
ground. Besides the feeling of fear and possibly nausea, riders often feel like they
are weightless. Are they truly weightless? If not, please explain why they feel
weightless.
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6) As a sky diver falls towards the ground, their body accelerates at 9.8m/s/s until
the parachute is opened.
a. What happens to the speed of acceleration when the parachute is opened?
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b. What is the upward force on the parachute?_________________________
c. When does TERMINAL VELOCITY(the object falls at a constant
velocity) occur with the sky diver?
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d. The skydiver falls for 60 seconds before pulling her parachute. What was
the skydiver’s velocity right before she pulled her parachute? Show your
calculations.
Skydiver velocity=___________________