When an object is first dropped, its speed__________
increases
100
What does a spring scale measure
weight
100
Find the pressure of an object 50 N and 10 cm squared
5 Pa
100
What is not a force? gravity, mass, magnetism, or friction
mass
200
Materials that reduce friction
Lubricants
200
There is no __________ in a vacuum
air
200
What form of friction causes a plane to slow down while flying
Drag
200
Streamlining reduces _____________
What is drag
200
Universal gravitation was discovered by ______
Newton, Einstein, Galileo, or Bernoulli
Newton
300
Force that opposes the movement of an object in air
Air Resistance
300
The farther you are from earth, the _______________ you weigh
less
300
___________ is caused in a change in atmospheric pressure (from high pressure to low pressure)
Wind
300
Sand is sometimes spread on an icy surface in order to _____________ friction
increase
300
The weight of an object tells you how ___________ an object is?
heavy
400
As the speed of a fluid increases, its pressure decreases
Bernoulli's principle
400
The weight of an object is a measure of the force of ___________ acting on it.
What is gravity
400
Force divided by area =
Pressure
400
The force that opposes the downward motion of a falling object is called the _____________
air resistance
400
The idea that all objects are attracted to one another is called___________
Universal gravitation
500
Speed at which air resistance and gravity acting on a falling object are equal
terminal velocity
500
______________ provides the force for the water pressure in most homes and offices.
gravity
500
Air pressure ________________ as altitude (distance from sea level) increases
decreases
500
The air pressure at the top of a mountain is pressure than the air pressure _____________
sea level, in a valley, canyon
500
If the area remains the same, you can increase the amount of pressure by________
increasing the force, decreasing the pressure, increasing the mass, or decreasing the mass