Unit 4 - Force & Acceleration
circular- Motion of an object in a circle in a constant speed
centripetal- Makes a body follow a curved path
centrifugal- A force that causes an object moving in a circular path to move out & away from the center of its path
free-body diagram- Used to show direction & magnitude of all forces
friction- Resisting force to the relative motion of solid surfaces
kinetic- Resulting from motion
static- Not moving
linear- Resembling a line
normal force- Perpendicular to the surface, opposite of gravity
net force- Overall force on an object
tangent- Line to a plane curve at a given point is the straight line that just touches the curve
torque- Tendency of a force to rotate around the axis
weight- Body's relative mass
apparent- The upward force, opposes gravity & prevents a supported object from falling
weightlessness- The bodies are approximately weightless
a = Δv / Δt
Δx= ½ at2 (if v0 = 0)
v12 = v02 + 2a (Δx)
Felastic = k Δx
Fk = μkFN
ac = v2 / r
Fc = mv2 / r
2. Q- What would be a good example of a FBD of a two dimension force?
3. Q- What are the formulas for net force, mass, and acceleration and how do they relate to each other?
4. Q- What are the equations for net force, mass, and acceleration?
5. Q- What is the definition of mass and weight and how do they differ from each other?
6. Q- What is apparent weight & would an elevator be a good example of apparent weight?
7. Q- What would be a good example of a model for a spring force?
8. Q- What would be the force required to slide a box across the ground due to friction?
9. Q- What would the speed be on the rotor if the radius was 3.0 m and the ride takes 2 seconds?