Measurement
4 km = _____ m
4000 m
Definition of energy
Something can produce a change in matter
Define stiffness
degree of resistance to deformation
Define pressure
amount of force per unit area
Example of Newton's third law
collision
Formula for density
density= mass/ volume
Definition of word
when a force succeeds in moving a body a distance
Define elasticity
ability to spring back after deformation
Pressure formula
F/A
Acceleration is proportional to _____ but inversely proportional to _____
net force, mass
Definition for velocity
Distance traveled in a unit of time in a given direction
Define power
rate at which word is done
Hooke's Law
change in length is proportional to the force applied to it
What is the air of the vocal tract measured in
unbalanced force is equal to
net force
Newton's 2nd Law of Motion (definition and formula)
When a net force acts on an object, the object will accelerate in the same direction as the force
Units for work and power
work: joule
power: watt
Example of a stiff object
wood
How do we measure force
the effect on an object
Define inertia
the tendency for an object to resist change and is proportional to mass
An increase in mass has what effect on momentum?
Increase in momentum
What two things govern its kinetic energy
mass and speed
Which is the most elastic?
A. Beach ball
B. Softball
C. Basketball
C. Basketball
Define uniform motion
speed is unchanging and in constant direction
Newton's first law
Moving objects will continue moving in a straight line at a constant speed and stationary objects will remain at rest