unbalanced forces cause accelerations
13 kg
What kind of quantity is weight? What causes it?
a force caused by gravity
An object in motion remains in motion
What is the Unit of Force?
Newton
At rest
or
Constant velocity
In Diagram A what is the net force?
0
What is Newtons second law for weight?
W = ?
W = mg
A Force must have caused her to accelerate
The Newton is made of what combined units?
kgm/s2
Since F=ma, the larger mass takes more force
In diagram B what is the net force?
10N East
In diagram A what is the acceleration?
0
The wheels push the earth and the earth pushes the wheels the same amount, equal and opposite.
If a projectile flies through the air what can you conclude about its horizontal velocity?
it is a constant velocity
17 kg
In Diagram C what is the net force?
7.1 N NE
In diagram B what is the acceleration?
5 m/s2 East
Mass
If a projectile flies through the air what can you conclude about its vertical speed?
it is increasing--accelerating downwards
150 N
free fall
In diagram C what is the acceleration?
3.6 m/s2 NE
78m
What are the forces on a projectile?
only the force of gravity