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Chapter 11 Forces

QuestionAnswer
friction forces that opposes the motion of 1 object past another
force any push or pull from 1 object to another
efficiency is the ratio of input to output energy usually written as a percentage
work measurment of the energy used to perform a task--this can change the amount of energy it has
position the location of an object
law of conservation of energy idea that energy can't be destroyed or created--it can only change form
fulcrum a pivot point for a lever
velocity measurment that combines the speed and direction of a moving object
momentum product of mass divided by _____-- more it has the easier to move other objects
speed is how fast an objects position changes over time
How does the force of gravity between 2 objects affect its mass and distance? Gravity increases with mass and decreases with distance
What dies friction produce as 2 or more objects come into contact? HEAT
What's Newton's 2nd law of motion? It states that force is equal to mass x acceleration F=mxa 120(newtons)=12x10
Newton's 3rd law of motion Acceleration, for every action there is an equal and opposite reaction ex:bumping into each other
What is potential energy? energy that is stored like a plate on a lower shelf v.s. a plate on a higher shelf
What is Kinetic Energy? energy of a moving object
What are balanced forces? these forces act on an object without changing its motion
What are unbalanced forces? these are forces that cause an object to change its motion
How is force measured? in Newtons (n) or poulds (lb)
What is an elevator, a compound and complex machine or a simple machine? compound and complex
Is a human a simple machine or a complex and compound machine? a simple machine
an example of momentum is... 2 people standing on opposite sides of an object, and pushing foward at the same time
Created by: EmDeny
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