Science
A pull or push that is applied to an object
Force
Does friction slow things down or speeds things up?
Slows things down
What is Newton's 2nd Law?
The force exerted by an object is equal to the mass of that object times its acceleration F=m*a
Force = mass X __?___
With the same amount of force, will a heavier object (more mass) accelerate faster or slower?
Acceleration; Slower
What is static electricity?
electric charges that build up on an object
2 examples of force not including cars
Opening a door, pushing something across a table, picking up a backpack, etc.
What has more friction, a ball rolling on grass, or a ball on a paved road?
A ball rolling on grass has more friction
What is Newton's 3rd Law?
For every action there is an equal and opposite reaction
What is speed?
the distance traveled over time, but does not include direction
example: 25 miles/hr
stationary, or standing still, or not moving
Definition of Mass
The amount of matter in an object
What is gravity?
A force that pulls you toward Earth; A force that exists between any two objects that have mass
Example for Newton's 1st Law
If you kick a ball it will eventually stop due to friction
If you kick a ball into a net the net will stop the ball
What is uniform motion and non-uniform motion?
Uniform-equal distance over time
Non-uniform motion- intervals not the same
static electricity is when there is an _________ of charged particles, that causes a ________ or ________ charge to ____ there for a while
imbalance;negetive;positive;stay
Mass changes depending on _____________ or ________________
where you are; what planet you are on
30N 60N
---->OBJECT<----
What is the Net Force acting on the object?
30N left/west
Example for Newton's 2nd Law
The heavier an object, like a rock, the more force needed to move it than a lighter object
What happens when forces are balanced on an object at rest?
When an object has more protons than electrons is has a ________ charge
positive
A force that opposes a body on a surface
Friction
What is Newton's 1st Law
An object at rest will stay at rest, and an object in motion will stay in motion, unless acted on by another force
Example for Newtons 3rd Law
In a rocket, hot gases are releases downward and an equal upward force pushes the rocket forward
What happens when forces are unbalanced?
If force are unbalanced then there is an change is speed direction or both.
When different objects rub against each other, it causes ________
friction