Term
| The difference between a reference point and an object in motion is... |
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Definition
| A reference point can be an object that is stationary or moving, but is a visual that appears to stay in place so that you can observe the motion of an object overtime, relevant to a reference point |
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Term
| The difference between speed, and time is... |
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Definition
Speed is the distance traveled by an object divided by the time it took to travel that distance.
S=D/T |
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Term
| The formula for determining average speed is... |
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Definition
Average speed= total distance
total time |
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Term
| The difference between speed and velocity is... |
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Definition
| Speed is how fast an object is moving and velocity is speed in a certain direction |
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Term
| How can one's velocity change? |
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Definition
| If the speed or direction or both change, velocity changes. |
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Term
| What is constant velocity? |
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Definition
| When speed and direction do not change |
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Term
| Define acceleration and how it relates to velocity. |
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Definition
| The rate at which velocity changes over time is acceleration. It relates to velocity because if velocity changes, so does acceleration |
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Term
| Positive and Negative Acceleration are... |
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Definition
Positive acc.-when an object speeds up
Negative acc.-when an object slows down |
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Term
| What is the formula for average acceleration? |
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Definition
| Average velocity= (final velocity-starting velocity/time it takes to change velocity |
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Term
| What is circular acceleration? |
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Definition
| Acceleration that occurs in a circular motion |
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Term
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Definition
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Term
| How does force pertain to acceleration? |
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Definition
| A force could change the speed or direction of an object, causing the acceleration to change |
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Term
| How do scientists express force? |
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Definition
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Term
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Definition
| All forces act on all objects. If gravity acts on all objects, too, then it is a force. |
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Term
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Definition
| The combination of all forces acting on an object. |
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Term
| Balanced and unblanced forces are... |
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Definition
Balanced- when the net force is equal to zero
Unbalanced- when the net forces do not equal zero |
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Term
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Definition
| A force that opposes motion between two surfaces that is caused by the interlocking of hills and valleys on the surfaces. |
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Term
| How can force affect friction? |
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Definition
| The more force you apply (more mass or push down harder) the greater the friction |
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Term
| How do rough surfaces affect friction? |
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Definition
| The rougher an object is (the more hills and valleys it has) the greater the friction |
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Term
| The different types of friction are... |
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Definition
Kinetic friction- friction between moving surfaces
Rolling Friction- using wheels to move an object
Static Friction- when force is being applied to an object and the object does not move |
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Term
| How can friction be helpful or harmful? |
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Definition
Helpful- car on a road- gets it moving
Harmful- Engines get hot and parts wear down |
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Term
| How can you reduce and increase friction? |
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Definition
reduce- use sandpaper, lubricants, etc.
increase- make surfaces rougher, push down harder on the object |
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Term
| What is gravity? What factors affect gravity? |
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Definition
| Gravity is the force of attraction between two objects.Distance and mass can affect the attraction between objects. |
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Term
| Where does gravity pull all objects on Earth to? |
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Definition
| To the center of the Earth. |
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Term
| Where does gravity pull all objects on Earth to? |
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Definition
| To the center of the Earth. |
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Term
| The Law of Universal Gravitation is... |
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Definition
| All objects in the univers attract each other through gravitational forces. |
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Term
| Gravitational forces increase as mass increases because... |
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Definition
| The larger the mass, the greater the attraction between objects. Even if one is small and the other larger, the small object will be attracted to the larger one |
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Term
| Why does gravitational force decrease as distance increase? |
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Definition
| The further apart two objects are, the lesser the gravitational attraction |
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Term
| What are weight and mass and how are they related? |
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Definition
| Mass is how much matter an object is made of. Mass does not change with a different location in the universe. Weight is the measure on the gravitational pull on an object and can change due to a different location in the universe. |
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Term
| What SI unit of measurements measure weight and mass? |
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Definition
Mass is measured in Kilograms(Kg)
Weight is measured in Newtons(N) |
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Term
| Why do objects of different masses fall to Earth at the same speed? |
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Definition
| Heavier objects experience a greater gravitational force than a lighter object. However heavier objects are harder to accelerate because of their increased mass. The extra mass of the heavier object exactly balances out the gravitational force making all objects fall at the same speed. |
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Term
| What happens to the speed of an object as it falls toward Earth? |
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Definition
All objects fall to Earth at an increasing rate of 9.8 m/s.
Second 1- 9.8 m/s
Second 2- 19.6 m/s
Second 3- 39.2 m/s |
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Term
| What motion opposes movement of objects in air? |
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Definition
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Term
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Definition
| When the air an object is moving in keeps the object from moving past a certain speed. The speed remains constant- not getting faster or slower |
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Term
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Definition
| When the air an object is moving in keeps the object from moving past a certain speed. The speed remains constant- not getting faster or slower |
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Term
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Definition
| Only happens if gravity is acting on an object and not other forces- no air is involved. |
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Term
| The moon stays in orbit around earth because??? |
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Definition
| The Earth's gravity pulls the moon, which has an opposing force wanting to travel in a straight toward Earth |
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Term
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Definition
| Is the curved path an object in motion follows because it follows the curvature of the Earth. Because of this, You must aim above a target when throwing an object long distance. |
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Term
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Definition
| An object at rest stays at rest until a force puts in motion. An object in motion stays in motion in a straight line and at a constant speed until a force affects it. |
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Term
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Definition
| The acceleration of an object depends on the mass of an object and the amount of force applied. |
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Term
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Definition
| For every action, there is an equal and opposite and reaction. |
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Term
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Definition
| The product of mass and velocity |
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Term
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Definition
| Momentum= Mass x Velocity |
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Term
| Law of conservation of momentum |
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Definition
| when an object collides, some momentum stays with the first object and the rest gets transferred to the second object. No momentum is lost. |
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Term
| LAw of conservation of energy |
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Definition
| Energy is never created of lost, it only changes forms |
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