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Force Test
Question | Answer |
---|---|
what is force? | -a push or a pull -all forces must have size and direction -measured by Newtons -more Newtons=greater the force |
what is net-force? | -an unbalanced force that will not equal zero -a balanced for that will equal zero |
what is Newton? | the unit for force |
what are balanced forces? | when the force is applied there is no movement |
what are unbalanced forces? | it produces a change in motion |
what is friction? | a force that apposes motion between two surfaces that are touching |
what is inertia? | the tendency of an object to resist changes in its state of motion |
what is gravity? | an attractive force between any two objects that depends on the masses of the objects and the distance between them |
what is mass? | the amount of matter in an object |
what is weight? | the gravitational force exerted on an object |
MEMORIZE!!! | NEWTON'S 3 LAWS (WITH MOM) put me in the incorrect box LOOK AT STUDY GUIDE!!! |
it takes ________ force to accelerate a light object? | less |
it takes ________ force to accelerate a heavy object? | more |
as mass is ____________ acceleration decreases? | increased |
as mass is ____________ acceleration increases? | decreased |
what is the formula for Newton's second law? | acceleration=force/mass |
balanced forces acting on an object..... | no movement |
unbalanced forces acting on an object.... | produce movement |
what are the 4 types of friction? | rolling, sliding,fluid,and static |
what frictional forces would a truck experience as more weight is added to its bed? | as more mass is added to the truck, the more force pushes it |
what are some things you can do to increase frictional force? | add salt or sand to an icy road |
what are some things you can do to decrease frictional force? | add lubricants |
what is the Law of Universal Gravitation? | states that the gravitational force increases as the mass of either object increases and as the objects move closer (relationship between mass and distance) |
as you increase the mass of an object what does this do to its force of gravity? | increase mass, increase gravity |
as you increase the distance between objects, what does this do to the force of gravity? | increase distance, decrease gravity |
IMPORTANT | review open note quiz review class notes bring calculator memorize formulas |
FORMULAS | force=mass x acceleration mass= force divided by acceleration acceleration= force divided by mass mass=weight divided by 9.8 m/s squared weight=mass x 9.8 m/s squared |