Measurements and Numbers
What is the SI unit for seconds?
(s)
What is Velocity?
Speed with direction.
What is the symbol for speed?
(v)
What is force?
An action that can change motion (push or pull).
What is friction?
A force hat opposes motion between two surfaces.
What are the 5 components of the design thinking process?
Empathize, Define, Ideate, Prototype, Test
What is 1D motion?
Movement along a straight line.
What is displacement?
The shortest distance between two points with direction. (also shown as delta x)
What is a drawing of a part of a complete system that's isolated in order to determine the force acting on that rigid body?
A free-body diagram.
What is the Formula for finding weight?
w = mg
weight = mass × acceleration of gravity(9.8 m/s2)
What is the symbol for the prefix micro-?
μ
distance / time
What are vectors?
Quantities with both magnitude and direction. (Acceleration and velocity are vectors)
What is the numeric value for the acceleration of gravity? (g)
9.8 m/s2
What formula came from Hooke's law?
F = -kx
force (N) = spring constant(N/m) × deformation (m)
What is the scientific notation of 2500?
2.5 x 103
On a d-t graph, how is acceleration shown?
Shown as a curved line.
What is kinematics?
Which Newton law is this?
a = f/m
m = f/a
f = ma
Newton's 2nd law.
What formula do you use to find the force of friction?
F = μN
friction force = mu × normal force (m × g)
What is the International System of Units in Physics?
Meters (m), Seconds (s), and Kilograms (kg)
No acceleration, moving at a constant speed.
If a car has an initial speed of 10 m/s, accelerates at a rate of 50 m/s2 for 3 seconds, what will its final speed be? (v = vo + at)
V = 160 m/s
What is the difference between static and kinetic friction?
Kinetic friction is where an object is moving, and Static friction is when the object isn't moving.
What is terminal velocity?
The maximum speed of a falling object. (can't fall any faster.)