Chapter 4 Newton’s First Law of Motion
A Force is any ____________________ or ________________________
Friction is the name given to the ___________________ that acts between
materials in contact as they move past each other.
Slope downward speed will ____________________________
Slope upwards speed will ______________________________
No slope speed will __________________________________
The property of a body to resist change _______________________
Newton’s First Law sometimes called The Law of ____________________
Newton’s First Law: Objects at rest tend to remain at ______________ and
objects in motion tend to remain in ______________ unless acted upon by a
force.
Mass is a measure of ________________________
Volume is a measure of how much ________________ and object occupies.
________________ is the quantity of matter in an object. Mass is measured
in _________________________________.
__________________ is the force of gravity on an object.
Relationship between mass and weight:
W = mg
Where:
W ______________________
m ______________________
g ______________________
The SI unit of Weight is the _________________________
The combination of all forces acting on an object is called the
___________________________. It is this force that changes an objects
motion.
Applied
Force
Net
Force
6N
6N
12 N
12 N
6N
6N
An object is said to be in ___________________________ when the net
forces equal zero.
Lets set a block on a table
If the block is stationary the net force on the block is _________________
Support Force
W = mg
The support force is often called the _______________________________
The magnitude of the block’s weight must ______________ the magnitude
of the support force.
Another Example of Equilibrium
50 N
50 N
100 N
Vector Addition of Forces
Determine the reading on the scale:
A
1kg
B
C
1kg
1kg