A skydiver of mass 80.0 kgkg (including parachute) jumps off a plane and begins her descent. Throughout this problem use 9.80 m/s2m/s2 for the free-fall acceleration, 1. At the beginning of her fall, does the skydiver have an acceleration? - No the skydiver falls at a constant speed - Yes and her acceleration is directed upward. - Yes and her acceleration is directed downward. 2. At some point during her free fall, the skydiver reaches her terminal speed. What is the magnitude of the drag force Fdrag due to air resistance that acts on the skydiver when she has reached terminal speed? 3. For an object falling through air at a high speed v, the drag force acting on it due to air resistance can be expressed as F=Kv2 where the coefficient K depends on the shape and size of the falling object and on the density of air. For a human body, the numerical value for K is about 0.250 kg/mkg/m . Using this value for K, what is the terminal speed Vterminal of the skydiver? 4. When the skydiver descends to a certain height above the ground, she deploys her parachute to ensure a safe landing. Usually the parachute is deployed when the skydiver reaches an altitude of about 900 mm (3000 ftft). Immediately after deploying the parachute, does the skydiver have a nonzero acceleration? 5. When the parachute is fully open, the effective drag coefficient of the skydiver plus the parachute increases to 60.0 kg/mkg/m . What is the drag force Fdrag acting on the skydiver immediately after she has opened the parachute? - No; the skydiver keeps falling at a constant speed. -Yes and her acceleration is directed downward. - Yes and her acceleration is directed upward. 6. What is the terminal speed Vterminal of the skydiver when the parachute is op
A skydiver of mass 80.0 kgkg (including parachute) jumps off a plane and begins her descent.
Throughout this problem use 9.80 m/s2m/s2 for the free-fall acceleration,
1. At the beginning of her fall, does the skydiver have an acceleration?
- No the skydiver falls at a constant speed
- Yes and her acceleration is directed upward.
- Yes and her acceleration is directed downward.
2. At some point during her free fall, the skydiver reaches her terminal speed. What is the magnitude of the drag force Fdrag due to air resistance that acts on the skydiver when she has reached terminal speed?
3. For an object falling through air at a high speed v, the drag force acting on it due to air resistance can be expressed as F=Kv2
where the coefficient K depends on the shape and size of the falling object and on the density of air. For a human body, the numerical value for K is about 0.250 kg/mkg/m .
Using this value for K, what is the terminal speed Vterminal of the skydiver?
4. When the skydiver descends to a certain height above the ground, she deploys her parachute to ensure a safe landing. Usually the parachute is deployed when the skydiver reaches an altitude of about 900 mm (3000 ftft). Immediately after deploying the parachute, does the skydiver have a nonzero acceleration?
5. When the parachute is fully open, the effective drag coefficient of the skydiver plus the parachute increases to 60.0 kg/mkg/m . What is the drag force Fdrag acting on the skydiver immediately after she has opened the parachute?
- No; the skydiver keeps falling at a constant speed.
-Yes and her acceleration is directed downward.
- Yes and her acceleration is directed upward.
6. What is the terminal speed Vterminal of the skydiver when the parachute is opened?
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