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Physical Science: Chapter 5

Across
Legend has it that Newton made the connection of the two questions when he observed an _____ during a summer night.
A force of attraction between objects that is due to their masses
Less than sliding friction, so the floor is slippery
Always along a straight line
Produce a change in motion
You can think of velocity as the _____ of an object's position
When an object is in motion, you can describe the direction of its motion with a _____, such as north, south, east, west, up, or down.
Simply a push or pull
Substances that are applied to surfaces to reduce the friction between them
The force that results from combining all of the forces exerted on an object
The _____ is a common reference point for determining position and motion
Have more microscopic hills and valleys.
A measure of gravitational force exerted on an object
The object that appears to stay in place is a _____
Unbalanced forces are also necessa
Down
When an object changes position over time when compared with a reference point
The amount of matter in an object, and its value does not change
When you combine two velocities that are in the same direction, add them together to find the _____.
Mass is measured with a _____.
The acceleration that occurs in circular motion is known as _____.
An important part of almost all means of transportation
The force that results from combing all the forces exerted on an object
The rate at which an object moves
Friction occurs because the surface of any object is _____.
SI unit of force