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Physics - Mechanics

Across
_____ is done when a force acts on an object and the object moves in the direction of the force. (Page 145)
This is speed in a given direction. (page 50)
Newton's _____ law describes the relationship among an object's mass, acceleration, and the net force on an object. (page 88)
The amount of force per unit of area. (page 91)
Newton's first law is usually called the law of this. (page 33)
The rate at which the velocity of an object changes. (page 51)
The law of conservation of energy states that energy cannot be ______ or destroyed. (Page 153)
The ratio of useful energy output to total energy output. (Page 158)
_____ is the mass of an object multiplied by its velocity. (Page 125)
_____ is how fast work is done. (Page 146)
Down
Energy of motion is called this. (Page 150)
Energy that is stored and held in readiness is called this. (Page 148)
This is how fast an object is moving. (page 48)
The law of inertia states that objects remain in motion if no _____ forces act on them. (page 39)
Any object that moves through air or space and is acted upon only by gravity. (page 73)
This is the force of gravity on an object. (page 37)
Newton's third law is often stated: "To every action there is always an equal opposing _____." (Page 108)
A ____ is a device used to multiply forces or simply to change the direction of forces. (Page 155)
This type of quantity contains both magnitude (size) and direction. (page 69)
This is defined as the quantity of matter in an object. (page 37)