Friction
what slows or stops an object in motion?
friction
friction slows down moving objects
true
what causes an object to go into motion
a force
give 2 examples of kinetic energy
a driving car, a student running, a bouncing ball
(anything IN MOTION)
how fast an object is moving
speed
what type of surface produces the least amount of friction?
smooth, flat
motion is how an object moves
false- it is an object's speed and direction
what mass needs little to no force to cause it to move?
less mass or little mass
an object at rest has _______ energy
potential
an object's speed and direction
motion
what type of surface produces the most friction?
rough, bumpy
when objects collide, friction is transferred
false- energy is transferred when objects collide
an object with more mass requires more/less force to put into motion?
more
give 2 examples of potential energy
a parked car, a student sitting, a ball on the ground (anything AT REST)
a push or pull that causes an object to move, stop, or change direction
force
friction affects the _____ of an object
speed & direction
friction takes away heat
false- friction creates heat
name a variable that requires an increase of force when getting an object to move
speed, mass
the energy of motion (speed & direction)
kinetic
a force that opposes the motion (speed & direction) of an object
friction
what is created by friction?
thermal (heat) energy
weight is the same thing as mass
false- weight is measured matter by gravity, mass is the amount of matter (atoms) in an object
the greater the mass of an object, the _____ affect force will have on it
less
what's the biggest difference in potential vs kinetic energy
motion (is object at rest or moving?)
the ability to work
energy