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What Causes a Change in Speed, Direction, or Both, and Cause an Object to Start Moving?

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What Causes a Change in Speed, Direction, or Both, and Cause an Object to Start Moving?

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An Unbalanced Force (Does not equal 0)

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What Do We Call the Combining of Velocities? 

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What Do We Call the Combining of Velocities? 

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Resultant Velocity

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An Example of a Motion Relative to a Reference Point 

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An Example of a Motion Relative to a Reference Point 

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The hands of a clock relative to the numbers on a clock.

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The SI unit for force (Symbol= N)

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A push or pull exerted on an object in order to change the motion of the object.

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The distance of the Earth and the Moon.

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The size of the force depends on the masses of the objects and the distance between objects.

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Questions Asked by Newton During His Study of Gravity

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Questions Asked by Newton During His Study of Gravity

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1. Why do objects fall towards Earth?
2. What keeps the planets moving in the sky?

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A force of attraction between objects that is due to their masses

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Speed measures how fast you are going, while velocity measures how fast you are going and also includes a certain direction (North, East, South, West)

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1. Kilometers Per Hour (km/h)
2. Feet Per Second (ft/s)
3. Miles Per Hour (mi/h)

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A substance that is applied to a surface in order to reduce the friction between surfaces.

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1. Increases temperature in car
2. Causes holes in socks
3. Erosion by wind and water

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The acceleration that occurs in a circular motion.

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The rate at which velocity changes over time.

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When a force is applied to an object but does not cause the object to move ("Static" means "not moving").

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When a force is applied to the object and the object moves ("Kinetic" means "moving").

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The speed of an object in a particular direction

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The distance traveled divided by the time interval during which the motion occurred (SI Unit= Meters Per Second- m/s)

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An objects's change in position relative to a reference point.

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The object that appears to stay in place.

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A force that opposes motion