Physics Study Guide 1st semester final exam.

Unit 1.

1. I will be able to use and convert between the base units and prefixes in SI units. a. Convert 500 miles/hour to meters/second 2. I will be able to use scientific notation correctly. a. Write 250,790,300 in scientific notation with the correct number of sig figs 3. I will know the difference between accuracy and precision. a. Dart board examples 4. I will apply the rules for significant figures correctly to calculated values. a. How many sig figs in the following a.i. 2.5390 a.ii. 2000 a.iii. 13.500 a.iv. 0.0035 a.v. 25.7 + 13.536 a.vi. 47 * 12,395

Unit 2.

1. Describe motion in terms of frame of reference, displacement, time, and velocity.

a. Velocity is change in position/change in time

b. Acceleration is change in velocity/change in time

2. Calculate the displacement of an object traveling at a known velocity for a specific time interval.

a. Displacement is equal to velocity times change in time.

3. Interpret graphs of position vs. time.

a. Be able to look at a graph and tell when there is constant velocity (+,-) and when there is acceleration (+,-) 4. Describe motion in terms of changing velocity.

a. Again positive changes in velocity verse negative changes in velocity.

5. Compare graphical representations of accelerated and non-accelerated motions.

6. Calculate displacement from the area under a velocity vs. time graph

a. Area under the curve is displacement on a velocity vs. time graph

7. Apply kinematic equations to calculate distance, time, or velocity under conditions of constant acceleration.

Be able to do the math

∆x= xf - xi slope=rise/run vf = vi + at

2 vavg = ∆x/∆t aavg=∆v/∆t ∆x = ½ at + vit

2 2 average speed= vavg= ½(vi+vf) vf = vi 2a∆x distance/time ∆x= ½(vi + vf) t

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9. Unit 3.

1. Distinguish between a scalar quantity and a vector quantity.

a. Scalars have only magnitude

b. Vectors have magnitude and direction

2. Add and subtract vectors graphically

a. Vector a + vector b= horizontal parts of both + vertical parts of both

3. Apply the Pythagorean theorem to calculate the magnitude and directions of a resultant vector

a. A2 + B2 = C2

b. Theta= Tan-1 ( B/A)

4. Resolve a vector into its components using sine and cosine functions a. Horizontal components of vectors with use the cosine function

b. Vertical components of vectors will use sine function

5. Recognize examples of projectile motion

2 2 a. constant ∆x=1/2at + vit + x0 this is the same format as ax +bx + c

6. Describe the path of a projectile as a parabola

7. Apply kinematic equations to solve problems involving projectile motion

a. What is the position of a projectile at a certain time?

b. How far from the base of this cliff with the projectile land?

c. Will this projectile land on top of this cliff?

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11. Unit 4.

1. Describe how an applied force affects the motion of an object

a. A net force will cause an acceleration

b. No net force will cause no change in velocity

2. Interpret and construct free-body diagrams

a. Start from center of mass

b. Draw arrows (vectors) for each force (appropriate direction and magnitude)

3. Explain the relationship between the motion of an object and the net external force applied to the object

a. Larger the net applied force the larger the acceleration of the object

4. Determine the net external force acting on an object

a. Given a force diagram be able to add the vectors to identify the net external force

5. Describe an object’s acceleration in terms of its mass and the net force applied to it

a. F=ma 6. Predict the direction and magnitude of the acceleration caused by a known net force

a. F=ma

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