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forces in motion

ashley elliott

what are the 4 possible effects of friction on objects? generate heat, slow down, stop, and not move at all
why does a soccer ball slow down when it rolls? friction
friction is_________ between rough surfaces than between smooth surfaces greater
the force of attraction between two objects is called _________. gravity
gravity causes falling objects to __________. speed up
what two things does the strength of gravitational force depend on? the mass and the distance between objects
gravitational force is stronger when objects are________ to each other. closer
gravitational force is stronger when objects have ______mass. more
why does a person weigh more on earth than on the moon? earth has a greater mass than the moon
what attracts objects to a magnet? the magnetic force in the magnetic field surrounding the magnet
what are the two ends of a magnet called? poles
describe how a compass can help you find direction? a compass is a magnet. Its north pole {needles} always points down to the north
what two forces act equally on a object but in opposite directions, the object__________ ___________. dosent move
when you add the total of all the forces acting on an object, you get the_____ _____. net force
the force if water pushing up on an object is called the __________. buoyant force
when you go down a slide, what force is acting on you to make you move? gravity
when you go down a slide, what force is acting on you to make you move? gravity
what force is acting to slow you down on a slide? friction
when the force if gravity ids equal to the force of friction, why will happen? the object will stop moving
what is the difference between balanced and unbalanced forces? unbalanced forces causes motion. balanced forces does not cause things to move.
what affects how an object moves? net force
what is the net force when forces are balanced? zero
what force pushes up on you in water? buoyant force
a buoyant force acts in ___________ from weight? opposite
what is weight? measure of the gravity pulling down on you
what will happen if the buoyant force is equal to or greater than the weight of the water you push aside? you will float
what will happen the buoyant force is lass than the weight of water you push aside? you will sink
what means using a force to move an object? work
if a force is applied and an object does not move, is work being done? no
what is anything that makes work easier? simple machine
what are the 2 parts of a lever and what do they do? arm-bar that you move fulcrum-is the balance point that stays still
give an example of a lever. hammer
give an example of an inclined plane. stairs
what is made of two or more simple machines? compound machine
how do compound machines help make work easier? less force on a greater distance
Created by: clakid