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Physics - Chapter 8

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QuestionAnswer
_____ is the product of force exerted on an object and the distance though which the object is moved Work
What is the SI unit of work? joule
_____ is the rate at which work is done. Powers
What is the relationship between work and force? directly proportional
What is the relationship between work and distance? directly proportional
What is the relationship between power and time? inversely proportional
What is the relationship between work and power? directly proportional
____ is the property of an object or a system that enables it to do work. Energy
What is the SI unit of energy? joule
_____ is the energy due to the position of something or the movement of something. mechanical energy
What is the term for energy that is stored or held in readiness? It is often due to the position of the object. potential energy
____ is the type of energy that is calculated by using the formula mgh gravitational potential energy
_____ is the type of energy due to motion. Kinetic
To calculate kinetic energy, you multiple the mass by 0.5 then by the _____ squared. velocity
The Law of _________ says that energy can't be created nor destroyed be can be transformed from one type to another. conservation of energy
A(n) ____ is a device used to multiply forces or simply change the direction of forces. machine
Simple machine that is made of a bar that moves around a pivot point is called a ____> lever
A ____ is the pivot point of a lever. fulcrum
___ is the ratio of output force to input force for a machine. mechanical advantage
A ____ lever has the fulcrum between the load and the force. type 1
A ____ lever has the load between the fulcrum and the force. type 2
A ___ lever has the force applied between the fulcrum and the load. type 2
A simple machine that is basically a lever that is used to change the direction of the force is called a___. pully
___ of any simple machine can be expressed as the ration of useful work output to total work input. efficiency
SI unit of power watt
The _____ can be concisely expressed as KE=PE=Work Work-energy theorem
Created by: abolvin
 

 



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