# Mechanics: 1-Dimensional Kinematics

## 1-Dimensional Kinematics: Audio Guided Solution

#### Extra Problem 14:

The velocity-time graph at the right depicts an object which starts moving in one direction and turns around and moves in the other direction. Determine the time (in seconds) at which the object reaches its initial position (i.e., starting point). (HINT: develop an equation for displacement based on the slope of the line and compute the unknown.)

## Audio Guided Solution

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## Read About It!

Get more information on the topic of 1-Dimensional Kinematics at The Physics Classroom Tutorial.

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## 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 iteself. They 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 understaning 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.