Free Fall
What is acceleration for Free Fall? (don't forget units!)
a= 9.8 m/s^2
a= 9.8 m/s^2 for all free fall problems
Change in velocity.
acceleration
When objects fall under the influence of gravity only.
free fall
What can we assume about initial velocity in free fall problems?
vi= 0 m/s
A construction worker drops a tool from the top of the building and it hits the ground after 3.5s. How tall is the building?
y= 60.03m
What is the units for Force?
Newtons
Prevents objects from being in free fall.
air resistance
If I say something is falling at 25 m/s downwards, am I talking about speed or velocity?
velocity because I also gave the direction
A construction worker accidentally drops a brick from a high scaffold. What is the velocity after 4s?
39.2 m/s downwards
What do we call a force that results from a push or pull
Applied Force
All objects in free fall accelerate at the same rate despite the fact that they have different _______.
masses
What is true about all objects in a vaccume?
They all fall at the same speed/velocity
Which equation will help you find distance from your kinetics equation list?
What do we call a force that is perpendicular to the surface
Normal Force
What is terminal velocity?
the constant speed that a freely falling object eventually reaches when the resistance of the medium through which it is falling prevents further acceleration.
Due to air resistance, what is true if we drop a feather and a brick from the same height at the same time?
They will have different velocities due to air resistance
A plant falls out of a window and hits the ground 4 seconds later, this is the height of the window?
78.4 m
If a 12 kg box is sitting on top of a surface, what is the Force of gravity?
Fg= 117.6 N
This man dropped cannon balls of unequal masses from a tower in Italy which showed that they landed at the same time.
Galileo