Study Guide for Physics Exam

# Study Guide for Physics Exam - Study Guide for Physics Exam...

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Study Guide for Physics Exam 1. What is Physics? The study of the physical world 2. The metric system. Pico(p) Nano(n) Micro( ) Milli(m) Centi(c) kilo(k) Mega(M) giga(G) 3. Linear, quadratic, and inverse relationships. 4. Units in equations. 5. Scientific notation: * and / : same # as Sig Dig as the least sig # Ex 178*42=7500 + and - : keep the same decimal place as my least precise # Ex. 2.1 + .0679=2.2 6. Construct, read, and interpret a graph. 7. What is the slope of distance vs. time graph? 8. What is the area under the curve for a velocity vs. time graph? (or any Graph) Displacement 9. Rearrange an equation to solve for a given variable. 10. Find average velocity . 11. What is the difference b/t speed an velocity? 12. W hat does negative velocity mean? The velocity is moving towards the left. 13. How do you find instantaneous velocity from a distance vs. time graph? Instantaneous velocity may not be the same as avg. velocity -to find instantaneous velocity use smaller and smaller intervals of time. 14. What is acceleration and how do you find it? The rate of change of velocity over time. 15. How do you find acceleration from a velocity vs. time graph? Slope of curve. See graph. 16. What is average acceleration? Units?

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17. Find final velocity when acceleration is constant and original velocity is known? 18. What does negative acceleration mean? The object is going left. It can speed up or slow down. The object may be falling in free-fall. 19. Find displacement when time and acceleration are known. 20. Find displacement when time and velocity are known. 21. Remember that when an object goes up and returns to its original spot, its displacement is zero. Also, that when going up velocity is chosen as pos. and is neg. when coming back down. 22. Remember that displacement can be negative, too. 23. Know Newton’s 1 st , 2 nd , and 3 rd Law 1.) (inertia): an object in motion will stay in motion unless acted upon by a net force. (at rest, stays as rest) 2.) Acceleration is directly proportional to net external force, and inversely proportional to mass. F=ma
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Study Guide for Physics Exam - Study Guide for Physics Exam...

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