Kinematics unit test
A test on this unit alone, marked as a percentage and a letter grade — for the test your class is actually sitting, rather than for May. Answer everything, then submit once: seeing the answer to question 3 before attempting question 4 makes the final percentage meaningless.
Slope of a position-time graph
Symmetry of projectile flight
Interpreting a curved velocity-time graph
Reading a graph to find another quantity
Kinematic equation without final velocity
Scalar vs vector
Instantaneous velocity from a position graph
Best-fit line vs connecting dots
Reducing uncertainty in timing
Area under a velocity-time graph
Kinematic equations condition
Identifying the independent variable
Short answer 1. Define or explain: Area under an acceleration-time graph
3 ptsShort answer 2. Define or explain: Kinematic equation without displacement
3 ptsShort answer 3. Define or explain: Time of flight for a projectile
3 ptsShort answer 4. Define or explain: When speed increases or decreases
3 ptsFree response
7 ptsA student launches a ball horizontally from the edge of a table of height 1.20 m with speed v₀ and measures where it lands. She repeats the experiment for several launch speeds. (a) Derive an expression for the horizontal distance R in terms of v₀, h and g. (b) The student plots R against v₀ and obtains a straight line through the origin. Explain why the graph is linear, and state what the slope represents in terms of h and g. (c) A second student claims that launching from a greater height would change the slope of the R-versus-v₀ graph. State whether this claim is correct and justify your answer.
Derive an expression for the horizontal distance R in terms of v₀, h and g.
The student plots R against v₀ and obtains a straight line through the origin. Explain why the graph is linear, and state what the slope represents in terms of h and g.
A second student claims that launching from a greater height would change the slope of the R-versus-v₀ graph. State whether this claim is correct and justify your answer.