Physics 213 Test 1 Review Sept. 12,
2001
8 problems 12 points each
1. Basics:
- Know the SI units for length, mass and time.
- Know the meaning of ratios, velocity and acceleration in
particular.
2. 1- D motion:
- know the difference between displacement and distance
Given two consecutive displacement vectors graphically, be able to
obtain the total displacement graphically.
Given two consecutive displacement vectors algebraically, be able to
obtain the total displacement algebraically.
know the difference between speed and velocity
- know the definition of average velocity and average
acceleration
- know the definition of instantaneous veloctiy and
acceleration.
3. Motion Diagrams
- Be able to draw motion diagrams for a object with positive (or
negative) velocity and positive (or negative) acceleration.
Be able to obtain the direction of acceleration by subtraction of
two velocity vectors graphically.
4. Displacement, velocity, and acceleration vs time curves
- given graph of displacement, velocity, or acceleration vs
time, describe motion
- given description of motion, draw graphs
- given disp vs time, or velocity vs time, or acceleration vs
time, draw the other two graphs.
- given acceleration vs time, be able to find the change in
velocity over a given time interval
- given velocity vs time, be able to find the change in
displacement over a given time interval
5. Kinematic equations of motion with constant acceleration.
Given a problem:
- Draw picture
- Draw reference frame
- Draw motion diagrams for each object over each time interval
(if different) to determine signs for velocities and
accelerations.
- Indicate with A, B, C, etc, the pertinent events.
- Write down x, v, and t values for each of these positions, and
acceleration between them.
- Express displacement and velocity as equations at each
position to obtain equations to solve to find the desired
objective.
6. Vector Problems: Given sequence of displacement or velocity
vectors in magnitude and direction, be able to find the magnitude and
direction of the sum or difference .
- first graphically
- then find x and y components
- then add (or subtract) like components to get components of
the resultant R
- then find the magnitude and direction of R