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What determines how much an object speeds up of slows down?
Net force.
How much does a parachute weigh?
90 lb
Why the mass with no parachute fell fastest?
Mass is always drawn to other mass. This is what produces the effect of Gravity, which is responsible for pulling the mass downward. When falling, there is one major factor which controls how quickly it falls--friction. The greater the surface area of the object, the greater the friction of air passing it, and slowing it down. The parachute adds a great amount of surface area without much extra mass, so the air-resistance (friction of air against it) is much greater. This causes it's "terminal velocity" (the greatest speed at which it can fall) to decrease dramatically. The end result is that because of the "difficulty" the air has getting around and past the object as it falls, the object dropps much more slowly. Take away the parachute, and it will drop much more quickly.
What is the pulley system for a mousetrap car?
Slows down the power output of the spring on the trap. So that makes it go slower, and go much further.
What is the force that makes an object slow down?
Friction is the force that slows objects down. Especially when combined with another force, such as gravity. When you have low friction, such as on ice, you slow down much slower than when you have high friction, such as on a road.
How much an object speed up or slows down?
That isn't a question.
What determines how much an object speeds up of slows down?
Net force.
How would the size of a parachute required to safely land a space probe differ on the planet Mars?
A parachute that would function on Mars would have to be very large, much larger than one used in Earth's atmosphere, because the atmospheric pressure on Mars is much lower. The surface pressure is only about 600 pascals, about 1/160th the sea level pressure on Earth. The thinner the atmosphere, the less force exerted against the parachute as it slows a falling craft. Some Mars probes are designed to use retro-rockets and inflatable cushioning bags, to supplement their parachutes.
Why does a man with a parachute descend slowly?
A parachute will slow down a free-fall by catching the air rushing past you. It's large, bag-like shape greatly contributes to the air resistance working against the gravitational pull, and so slows your fall down a point that it is no longer dangerous.
Would you slow down or keep moving if there wasn't much friction?
You would keep moving, because friction is what slows you down.
Why does the downward velocity of the parachutist decrease after the chute is opened?
There are 2 types of parachute - the round parachute and the more modern wing parachute. The round parachute is a decelerator and works on drag only through the atmosphere. However, with the wing shaped 'square' parachute, they act with an additional force of lift. Another name for this type of parachute is the Ram Air Parachute. Whilst few of them ever generate enough lift to gain altitude, they do create masses of forward motion which gives them better range to land back on the dropzone. You also get better, safer landings which are easier on the knees! Most dropzones these days only use squares. I would recommend a tandem jump for your first one which uses this more modern type of parachute. A parachute is deployed using a smaller drogue pilot chute which drags the main parachute off the container. The container is a combined harness which holds the packed parachute on your back. As the parachute inflates, it will slow you down from 120mph to around 10mph average. The final stage is landing, where the skydiver pulls down on both steering toggles to further slow down the decent rate for a tip-toe soft landing.
What happens to your breathing rate after a running race?
It slows down back to normal. Your heartbeat increases as you run, and it slows down as you slow down. Your cells don't need as much oxygen to fuel your cells when you're walking as when you're running. So, your heart doesn't pump as fast when you stop running. Therefore your lungs don't need to supply as much oxygen, so your breathing slows down.
Can you use a umbrella for a parachute?
No umbrella could survive that kind of stress; they are designed to resist the force of raindrops, not falling people. Most bags also would be much too small and too weak, however, a large strong bag could indeed be used as a parachute - that's basically what a parachute is (although a para-foil is a more sophisticated design).
Why did the feather and the hammer land the same time on the moon and different times on the earth?
The Earth has an atmosphere and the moon doesn't, so a falling feather on Earth runs into quite a bit of air resistance which slows it down much more than a hammer. On the moon, there is no air resistance.
Why air resistance acts in the opposite direction of gravity?
Yes, air resistance acts in the opposite direction as an object in motion. (It's air resistance.) In aeronautical terms, we call it drag. Generally, air resistance refers to the effects created on an object moving through it that in some way work to "limit" the object's motion. The air is "just there" and the movement of an object through it sets up the conditions to create air resistance.
Why rain gauge use?
So that you know how much precipitation is falling down and it gives you an idea on how much its raining.
How much does a parachute weigh?
90 lb
