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Mechanics one
Basic Mechanics chapter one
| Question | Answer |
|---|---|
| Force is defined as any action that tends to _________ or _________________. | Produce : modify motion |
| A force that pulls objects toward the center of the earth is called a ______________ force. | Gravitational force |
| When a force is applied to an object, the object presents an _______________ _____________ in return. | Opposing force |
| The two basic types of energy are | Potential and kenetic |
| Potential energy can be classified an energy that ________ ___________ to perform work, while kinetic energy actually ___________ ________. | Has capacity; perform work |
| 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 |
| The rate at which energy is expended is called | Power |
| If you divide the product of force times distance by the time involved, you will obtain the __________ used in moving an object. | Power. |
| Friction may be defined as resistance to ___________ between two objects when placed in contact with each other. | Contact |
| lubricant is one of the means by which _________ is ___________. | Friction; reduced |
| Friction can be ___________, but not _____________. | reduced; eliminated |
| A point on any object where the forces that act on that object are concentrated is called the ________ ________ ____________. | Center of gravity |
| The center of gravity for objects with a simple configuration can easity be lacated by finding the _________ __________. | Balance point |
| 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 |
| When lifting an object with a hoist, you should normally connect the hoist hook directly _________ the __________ center of gravity | Over: estimated |
| 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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