Ch. 6 Vocab
If two variables are ____________, then when one increases, the other increases as well
What is proportional?
A sketch or a graphical illustration that provides a visualization of all applied forces acting on an object
What is a free-body diagram?
_________________ cause an object to accelerate
What are unbalanced forces?
This force acts on materials that are in contact with each other in the opposite direction of the objects' relative motion
What is friction?
What is meant by "free fall" in physics?
An object affected by gravity alone, removing air resistance from the equation
If two variables are ______________________, then when one increases, the other decreases, and vice versa
What is inversely proportional?
A push or pull
What is a force?
For a constant force, an increase in an object's mass will result in a ________ in the object's acceleration
What is decrease?
Suppose you exert a horizontal push on a crate that rests on a level floor and it doesn't move... How much friction acts compared with your push?
Why doesn't a heavy object accelerate more than a light object when both are freely falling?
Gravity causes both objects to accelerate at the same rate (10 m/s squared)
This famous concept discovered by a famous physicist states that as the force acting upon an object is increased, the acceleration of the object is increased and as the mass of an object is increased, the acceleration of the object is decreased
What is Newton's Second Law of Motion?
Force per unit of area
What is pressure?
What is the mathematical formula for acceleration that we learned about?
What is A=F/M
How great is the air resistance that acts on a 10-N sack that falls in air at constant velocity?
What is 10-N?
Does air resistance on a falling object increase or decrease with increasing speed?
Air resistance increases with increasing speed
This term describes any matter that flows... examples include liquids and gasses
What are fluids?
The unit of measurement for pressure
What are pascals?
Acceleration is tripled as well
When do you produce more pressure on the ground, standing or lying down?
Standing
What is the acceleration of a falling object that has reached its terminal velocity?
Force that is in opposition to the relative motion of an object as it passes through the air
What is air resistance?
The point at which an object in free fall stops accelerating (due to air resistance equaling the force of gravity acting on the object)
What is terminal speed/terminal velocity?
If the mass of a sliding block is tripled at the same time the net force is tripled, what is the object's acceleration?
There will be no change in acceleration
Would you rather lie on a bed with a single upward facing nail or a bed completely covered in upward facing nails?
A bed completely covered in upward facing nails
What, besides speed, affects the air resistance on a skydiver?
Surface area (body orientation, parachute, etc.)