Space Flight, Gravity, and Forces - 8A

NASA's Vomit Comet

By: Qianyi, Hongyu, Tyhler!!! :)

It got its name from all the passengers who threw up during the ride. "vomit"

The NASA's Vomit Comet is an airplane that travels similar to roller coasters. It gives you the effects of 0 gravity.

They use over ten different air crafts to show this effect.

It can cost over $3,500.

These flights are open to the general public.

2/3 of the passengers who took it became ill.

Inventors were German brothers: Fritz & Heinz Haper in 1950.

There are only 6 countries that offer this.

Every dive, the vomit comet offers 30 seconds of a weightless feeling.

Average flight does 30 to 40 dives.

What are g-Forces?

BY ANDY, MAX, MALWINA, AND ALLEN

Most Roller Coasters are 4-5 G's

G-force, short for gravitational force, is acceleration relative to free fall.

While in free fall, an object feels zero G force.

One G = 9.8 m/s2

2 g's is 2 x 9.8 m/s2, and so on and so on.

The acceleration of gravity is also 9.8 m/s2.

The law of universal gravitation says that every object attracts every other object with a force.

The highest known acceleration voluntarily experienced by a human is 46.2g.

Human Effects of Weightlessness

Zero gravity means the condition in which apparent effect of gravity is zero, as in the case of a body in free fall in orbit.

Humans have little difficulty surviving in space for short periods of time. Long-term exposure to weightlessness can trigger detrimental physiological to the body.

Weightlessness is the condition that exists for an object or person when they experience little or no acceleration except the acceleration that defines their inertial trajectory or the trajectory of pure free fall.

Inertia is the tendency of an object to resist being moved or if, the object is moving, to resist a change in speed or direction until an outside force acts on an object.

One side effect of weightlessness is fluid redistribution which occur when bodily fluids from the lower body to the head and upper body causes head congestion and puffy face.

Another side effect is bone damage. The bones tissue is deposited and resorbed not needed. This means the mechanical demands on bones are reduced in microgravity.

What is an Orbit?

orbit is a regular repeating path that an object in takes around another one

In This picture you can see space shuttle orbiting the Earth

In an Atom the electrons

orbits around the protons

and neutrons

What is Microgravity?

By Peter, Najah, Lena, Hao

Helped by ANDY

A microgravity is...

Is a lack of gravity.

In a microgravity environment,

any heavy object would be easier to move.

Microgravity affects an object

when the object is in free fall

when there is basically only gravity affecting it

Projectile Motion

GROUP MEMBERS

MIA

YIA - LU

ANWAR

XUE QING

WHAT IS PROJECTILE MOTION?

• PROJECTILE MOTION IS ANY OBJECT THAT IS DROPPED AND CONTINUES IN MOTION BY ITS OWN INERTIA AND IS INFLUENCED ONLY BY THE DOWNWARD FORCE OF GRAVITY.

• PROJECTILE MOTION IS WHEN AN OBJECT IN WHICH THE ONLY FORCE ACTING IS GRAVITY

• NO AIR RESISTANCE ARE ALLOWED.

• THERE SHOULD BE NO OTHER FORCES, JUST GRAVITY PUSHING DOWN.

EXAMPLES OF PROJECTILE

The way the water

comes from the fountain

is an example of projectile

motion.

THIS IS ALSO AN EXAMPLE OF PROJECTILE. IN THIS PHOTO THERE ARE TWO DIFFERENT TYPES OF PROJECTILE MOTION.

TYPES OF PROJECTILE

THE FIRST TYPE OF PROJECTILE IS WHEN AN OBJECT IS DROPPED AT REST.

THE SECOND TYPE OF PROJECTILE IS WHEN AN OBJECT IS JUST BEING THROWN VERTICALLY UPWARDS.

THE LAST TYPE OF PROJECTILE IS WHEN AN OBJECT IS THROWN UPWARDS INTO THE AIR AT AN ANGLE TO THE HORIZONTAL

But free fall can affect an object on Earth, like on a roller coaster.

Simulated Gravity

Simulated gravity is actually known as "Artificial Gravity"

Artificial gravity is created by centripetal force.

Centripetal force is an unbalanced force that causes objects to move in a circular path.

The word centripetal means toward the center.

The outcome of centripetal force is the outward position that the objects affected by the artificial gravity.

The moon stays in orbit around the Earth because Earth's gravitational force provides a centripetal force on the moon.

The terminal velocity of hailstones is between 5 and 40 m/s

depending on their size. If there were no air resistance hailstones would hit the Earth at velocities near 350 m/s.

Another example would be a parachute.

The parachute increases the air resistance of the sky diver and slows him to a safe terminal velocity.

Somtimes terminal velocity can be a good thing.

Every year a hail storm damages many cars, buildings, and vegetations.

Thanks for watching!

I HAD TO START EVERYTHING OVER BECAUSE IT DIDNT SAVE

SO an object is in microgravity

What microgravity provides

It provides new information.

and when there is a lack of it.

A lack of gravity. It is also known as weightless

I

1/3 of the passengers are fine.

In physics an orbit is the gravitational

curve path of an object around an point

Like in this picture the + sign is the central point and the two white objects are the ones that revolves around the point.

Terminal Velocity - The constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the force of gravity

Orbit are elliptical in shape which means they are similar to an oval