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Basic Mechanics chapter one

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Question
Answer
Force is defined as any action that tends to _________ or _________________.   Produce : modify motion  
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A force that pulls objects toward the center of the earth is called a ______________ force.   Gravitational force  
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When a force is applied to an object, the object presents an _______________ _____________ in return.   Opposing force  
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The two basic types of energy are   Potential and kenetic  
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Potential energy can be classified an energy that ________ ___________ to perform work, while kinetic energy actually ___________ ________.   Has capacity; perform work  
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Horse power is the standard unit of _____________ that is used to denote the rate at which a machine works. Thus, if a machine is capable of raising a weight of 550 pounds to a height of one foot in one second, that machine is said to have a rating of ___   Measurement; One  
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The rate at which energy is expended is called   Power  
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If you divide the product of force times distance by the time involved, you will obtain the __________ used in moving an object.   Power.  
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Friction may be defined as resistance to ___________ between two objects when placed in contact with each other.   Contact  
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lubricant is one of the means by which _________ is ___________.   Friction; reduced  
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Friction can be ___________, but not _____________.   reduced; eliminated  
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A point on any object where the forces that act on that object are concentrated is called the ________ ________ ____________.   Center of gravity  
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The center of gravity for objects with a simple configuration can easity be lacated by finding the _________ __________.   Balance point  
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A person normally locates the center of gravity of an irregularly shaped object by ___________ the balance point, and then verifies this point by the ______ and _______ method.   Estimating; Trail and error  
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When lifting an object with a hoist, you should normally connect the hoist hook directly _________ the __________ center of gravity   Over: estimated  
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Should the weight of an object shift while attempting to lift it, you should return the object to the floor and mover the lifting point________ the heavy end.   Towards  
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