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9th Science- Test 2

Across
What term do physicists use to refer to any change in velocity
An object that hangs from a fixed point and swings back and forth because of gravity
What type of friction affects a sliding object already in motion, starts with letter 'K'
What is the term for devises used to multiply force for the purpose of doing work
Device that is considered a circular lever and can be used to multiply distance, speed or force
Together, the branches of physics discovered before 1900 are called
The attractive force that exists between any two bodies and is caused by their mass
The distance an object travels per unit of time
What branch of physics addresses the effects of forces on matter
What is a combination of one or more fixed pulleys and one or more moveable pulleys
The sum of two or more vectors
What is a simple machine consisting of a wheel over which a rope or cable passes
What is the study of motion and forces
What is any mathematical quality that is both magnitude and direction
Down
The center-seeking force that causes an object to travel in a curved path
What is the SI unit of work
What SI unit is used to measure power
What type of quantity consists of only a magnitude, with no direction
A quantity that represents any change in an object's position
What type of friction affects stationary objects, preventing them from moving
What is the velocity at which air resistance stops a falling object from accelerating
The measure of how well a machine converts input work to output work
Quality of motion is defined as a product of an object's mass and velocity
The simple machine which is like an inclined plane that modifies the applied force and directs it to the side