Mechanics: Momentum and Collisions
Momentum and Collisions: Audio Guided Solution
Extra Problem 7:
A 1.8-kg block is sliding down a 8.0-kg frictionless incline. Both are initially moving to the right at 10.0 m/s. If the block ends up moving to the right at 26.7 m/s on the horizontal surface, determine the final velocity of the incline (in m/s). Indicate the direction as right or left.
Audio Guided Solution
Habits of an Effective Problem Solver
An effective problem solver by habit approaches a physics problem in a manner that reflects a collection of disciplined habits. An effective problem-solver...
- ...reads the problem carefully and develops a mental picture of the physical situation. If needed, they sketch a simple diagram of the physical situation to help visualize it.
- ...identifies the known and unknown quantities in an organized manner, often times recording them on the diagram itself. Then equate given values to the symbols used to represent the corresponding quantity (e.g., vo = 0 m/s; a = 4.2 m/s/s; vf = 22.9 m/s; d = ???.).
- ...plots a strategy for solving for the unknown quantity; the strategy will typically center around the use of physics equations be heavily dependent upon an understanding of physics principles.
- ...identifies the appropriate formula(s) to use, often times writing them down. Where needed, they perform the needed conversion of quantities into the proper unit.
- ...performs substitutions and algebraic manipulations in order to solve for the unknown quantity.
Read About It!
Get more information on the topic of Momentum and Collisions at The Physics Classroom Tutorial.
Watch It!
Try our YouTube video on the topic of ...