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Just as a leaf falls slower to the ground than a tennis ball, a skydiver changes his/ her body position to change the amount of surface area that is affected by air resistance. A flatter body position, for example, will slow a skydiver's freefall rate from a normal arched position.
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∙ 13y ago
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How fast does a skydiver fall?
Speed during free fall can change depending on a skydiver's size and body orientation. In the belly to earth orientation, the speed is about 120 mph. If the skydiver is wearing a wing suit, their vertical speed could be as low as 60 to 70 mph. In a head down orientation, the speed can often be greater than 200 mph.
A skydiver slows down from 65ms to 5ms by opening the parchute if this takes 0.75 seconds what is the skydiver's accerlation?
66.7 m/s2
TheI momentum of a skydiver increases as speed increases does the momentum of the earth simultaneously change how much and in what direction how does the system made up of the earth and the skydiver?
For a simple answer, we have to ignore air resistance. As the skydiver's downward momentum increases, the earth's upward momentum increases by an identical amount. The total momentum of the earth-skydiver system remains constant.
Why is a skydiver not in freefall?
A skydiver is not in freefall when they have opened their parachute. The move from free-fall to controlled decent under a wing.
Why won't a skydiver's speed continue to increase until his or her parachute opens?
Once a skydiver jumps off the plane, they will begin picking up speed. However, as the speed of the skydiver increases, the amount of air resistance acting upon them will also increase. The skydiver will continue to accelerate while his or her weight is greater than the air resistance. When the force of the air resistance becomes equal to the weight of the skydiver, the skydiver will stop accelerating and will continue falling at a constant speed, this is known as the terminal velocity. While travelling at terminal velocity, the skydiver will be able to adjust his or her body position in a way that will increase or decrease the air resistance and allow the diver to alter their speed. Releasing his or her parachute will drastically increase the amount of air resistance and therefore slow their descent significantly.
Does it mean a skydiver is slowing down if the acceleration of the skydiver decreases as falling progresses?
No.Acceleration is a measure of the rate of change of velocity (speed & direction). If acceleration is decreasing (but still above zero) then this means that the rate at which the speed is increasing in this direction is decreasing.As long as the downward acceleration is greater than zero then the skydiver's speed is still increasing.Once terminal velocity is reached then downward acceleration will equal zero (speed is constant).If the downward acceleration falls below zero (as will happen once his parachute is deployed for instance) then this means he is slowing down.
How can a skier achieve greater velocity than a skydiver?
If a skier is in a jump, then a skier and skydiver is pretty much the same thing. In general though, a skydiver has only air resistance, the skier has air resistance and friction with the ski-snow, so the skydiver has an edge on speed.
Is the skydiver increasing or decreasing his speed during the first 3 seconds?
Increasing.
Why does a skydiver loose speed when he opens his parachute?
Because it fills with wind and increases his air resistance.
If a skydiver reaches terminal speed after ten seconds will the skydiver gain more speed during the first second or the ninth second?
I would imagine that it is uniform acceleration up until terminal speed. However, wind resistance will be higher 10000 feet up, so acceleration may be less at the start
what force is increased after the skydiver open parachute?
To start with there is gravitational attraction. As soon as the skydiver starts falling, (s)he will experience the drag force due to air resistance. The gravitational force is essentially constant but the drag increases as the diver's velocity increases until it equals gravity. The diver is the falling at terminal velocity and will continue to do so until the parachute is operated.
Why several seconds after jumping from an aircraft a skydiver will be travelling at a constant speed?
Because you reach maximum velocity.
