Sky diver jumps from a plain in a lying face down position. After a handful of S

Question

Sky diver jumps from a plain in a lying face down position. After a handful of Second the sky diver reaches "terminal velocity ". At this point the sky diver is falling at a constant velocity. If the height of the sky diver is 170 cm and the weight of the sky diver is 500 N then what is the net force on the sky diver once the sky diver reaches terminal velocity? It the height of the sky diver is 1 70 cm and the weight of the sky diver is 500 N t en what is the force of air resistance on the sky diver at terminal velocity? If the sky diver rotates so that the sky diver is upright. The sky diver now has less surface area to the air as the sky diver falls. This means that the sky diver has less air resistance. Will the sky diver's "terminal velocity" increase, decrease, or stay the same. Explain why. The sky diver pulls his or her parachute. When the chute opens (lots of surface area now) what initially happens to the air resistance force on the sky diver and how does that affect the sky diver's velocity? Eventually the sky diver will reach "terminal velocity'' again - although in this case that velocity will be fairly small. Once the sky diver reaches terminal velocity what will the force of air resistance on the sky diver be and how does that force compare to the force of air resistance that was on the sky diver when he was at "terminal" velocity without the parachute?

Explanation / Answer

a) Terminal Velocity : The maximum attainable velocity , means at this velocity object has zero acceleration

acceleration = 0

net force = mass * acceleration   

net force = mass * 0 = 0 N

so, net force on sky driver = 0 ( ZERO ) N

b)

net force = 0

air resistance - weight of body = 0

air resistance = weight of body

air resistance = 500 N

c ) since surface area decreases so sir resistance will decrease so

weight of body > air resistance

it means there is a net downward force

there is net down acceleration n downward direction & also velocity is in downward direction so final velocity in downward will increase

hence, terminal velocity will be increase.

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