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a push or a pull that causes an object to move, stop or chagne direction force
force that pulls all objects in the universe toward each other gravitation
forces going in the oppoite direction and one force is greater than the other unbalanced force
forces equal in size and opposite in direction balanced force
force that goes against motion when two surfaces rub together friction
force of pushing or pulling between magnetic poles magnetism
What are the three main forces we studied? gravitation, friction, magnetism
special type of gravitation that pulls things towards the earth. gravity
Will two north ends of a magnet attract or repel? repel
Will two south ends of a magnet attract or repel? repel
Will a north and south ends of a magnet attract or repel? attract
Forces always act in ________. pairs
Is the gravitational force bigger or smaller when objects are farther apart smaller
If an object is extremely large, like the sun, it the gravitational force bigger or smaller? bigger
T/F? Gravity pulls people to the earth and earth towards the people True
If a moving object stops, then the forces must be ___________ unbalanced
If a moving object keeps moving at the same speed and same direction, the forces must be balanced
If a stopped object starts moving, the forces must be unbalanced
If an object isn't moving, the forces must be balanced
What is the net force of a tug of war game if one side pulls with 50 newton and the other side pulls with 20 newton? 30 newtons
force that causes a material to twist torsion
stretching force that pulls on a material tension
pressing force that squeezes a material together compression
the movable and removable parts of a structure live load
Wind, rain, earthquakes, and sunshine are all examples of what kind of special load environmental live load
What type of bridges use strong cables to help support the dead and live loads of the bridge suspension bridges
type of force that occurs when two objects touch direct force
type of force that occurs even though the objects do not touch indirect force
Is magnetism a direct or indirect force both
Is gravitation a direct or indirect force indirect
Is friction a direct or indirect force direct
If all the atoms are lined up in a substance, then that substance is probably a magnet
Will a magnet lose its magnetic force if it is drop very very hard? yes
What two things affect gravitation? mass and distance
Will a magnet lose its magnetic force if it is broken in half? no
Created by: edeboo

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