General
An object will move if the forces acting on it are...
unbalanced
A game of tug-of-war
Tension
Friction forces act in the ______ direction of the motion of the object
opposite
More mass =
More gravity
What transfers between objects to create a charge?
electrons
What is the unit used to measure force?
Newtons (N)
You poke your friend.
Friction is _________ between two objects when mass increases.
greater
More distance =
less gravity
Likes _______ and opposites ________
repel, attract
What two words can be used to describe a force?
(Hint: they both start with the same letter)
Push and Pull
A feather falls slower than a hammer on Earth due to...
air resistance
Which is the easiest type of friction to overcome?
rolling friction
Which force opposes the force of gravity?
air resistance
Magnets have the strongest force at...
the poles
What are the 3 non-contact forces?
Gravity, electric, and magnetic
Your desk is exerting a force on the Chromebook on top of it.
normal
The hardest type of friction to overcome is...
static friction
Without air resistance, the acceleration of falling objects falling to Earth is...
9.8 m/s2
A magnet attracts any material containing...
iron
What are the 6 contact forces?
Applied, air resistance, normal, tension, friction, spring
You get shocked when you touch a doorknob.
electric
Air resistance is an example of which type of friction?
fluid friction / skin friction
True or False: Mass has a greater affect on the force of gravity than distance.
FALSE
Three methods of objects getting charged, and describe them
Friction: rubbing objects, transfers electrons
Conduction: touching objects, transfers electrons
Polarization: charged object comes near neutral object, creating a slight charge