gravity and motion
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Gravity and Motion
Acceleration due to gravity
Acceleration-the rate at which velocity changes over time.
All objects accelerate toward Earth at a rate of 9.8 meters per second per second.
Terminal velocity
The constant velocity of a falling object when the force of gravity is balanced by air resistance.
The parachute increases the air resistance of this sky diver and slows him to a safe terminal velocity.
Orbit
The path of one object around in space.
Free Fall
The motion of a body when only the force of gravity is acting on the body.
Centripetal Force
An unbalanced force that cause objects to move in a circular path.
Air Resistance
The force that opposes the motion of objects through air.
Momentum
The momentum of an object depends on the object’s mass and velocity. The more momentum an object has, the harder it is to stop the object or change its direction.
Momentum (p) can be calculated with the equation below:
p = mass × velocity
Projectile Motion
The curved path of a thrown object near Earth’s surface.
Projectile Motion
Vertical –Vertical motion is motion that is perpendicular to the ground.
Gravity pulls everything on Earth downward toward the center of Earth. A ball in your hand is prevented from falling by your hand. After you throw the ball, gravity pulls it downward and gives the ball vertical motion.
Horizontal- horizontal motion is motion parallel to the ground.
Question 1
The path of one object around in space
Orbit
Question 2
An unbalanced force that cause objects to move in a circular path
Centripetal force
Question 3
The motion of a body when only the force of gravity is acting on the body
Free fall
Question 4
The curved path of a thrown object near Earth’s surface
Projectile Motion
Question 5
The constant velocity of a falling object when the force of gravity is balanced by air resistance
Terminal Velocity
Question 6
The force that opposes the motion of objects through air
Air Resistance
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