Test #1 Flashcards
1
Q
Velocity
A
A changing position
-is a vector
2
Q
Speed
A
Just the magnitude part
3
Q
Acceleration
A
A changing velocity
-is a vector
4
Q
Newton’s first law
A
- an object in motion remains in motion, Ina straight line at constant speed, unless acted on by some net force
- an object at rest remains at rest unless acted on by some net force
5
Q
Newton’s second law
A
F=m*a
Force=mass*acceleration
6
Q
Mass vs. weight
A
- mass is a measure of the amount of matter
- weight is the effect of gravity on that mass
7
Q
Density
A
D=M/V
- how much mass is packed into a given size
8
Q
Newton’s third law
A
For every force there is an equal and opposite reaction force
9
Q
Weight
A
Weight=massg= mass9.8 m/s^2
- mass in kg
- weight is in Newton’s
10
Q
Pressure
A
P=force/area
11
Q
Work
A
W=F*d
- done when an object moves due to a force
- no motion means no work
12
Q
Energy
A
Kinetic- energy of motion
Potential- stored energy
Conservation of Energy
13
Q
Power
A
Power=work/time
14
Q
Requirements for SHM ( simple harmonic motion)
A
- an equilibrium position
- a linear restoring force
- inertia
15
Q
Driven oscillations
A
Driving frequency must match natural frequency
16
Q
Vectors
A
- Have a magnitude and a direction
- many items can be represented by vectors: velocity, force, momentum
