# Units & Kinematics I.txt

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1. 10x, name x for each one of the following cases:
giga
kilo
nano
pico
mega
centi
micro
milli
• 9
• 3
• (-9)
• (-12)
• 6
• (-2)
• (-6)
• (-3)
2. (4x10-10)(5x1014)=
20x104=2x105
3. Sin(0°)
0
4. Sin(30°)
1/2
5. Sin(45°)
√2/2
6. Sin(60°)
√3/2
7. Sin(90°)
1
8. Sin(180°)
0
9. Cos(0°)
1
10. Cos(30°)
√3/2
11. Cos(45°)
√2/2
12. Cos(60°)
1/2
13. Cos(90°)
0
14. Cos(180°)
-1
15. Log45=x means?
10x=45
16. SOH-CAH-TOA
• Sin is Opposite over Hypotenuse
• Cos is Adjacent over Hypotenuse
• Tangent is Opposite over Adjacent
17. Kinematics is...
a branch of Newtonian mechanics that deals with the description of motion.
18. Give an example of a Kinematics problem describing motion in only one dimension
Dropping objects problem
19. Give an example of a Kinematics problem describing motion in two dimensions
Projectile motion problem
20. Define displacement.
Is it a scalar or vector quantity?
SI units
an object in motion experiencing a change in its position in space undergoes displacement.

It's a vector quantity, connecting in a straight line the objects initial and final positions.

m
21. Define velocity.
Scalar or vector?
SI units
Rate of change of displacement in a given unit of time.

Vector.

m/s
22. Define speed.
Scalar or vector?
SI units
• Rate of actual distance traveled in a given unit of time.
• Scalar.
• m/s
23. Define acceleration.
Scalar or vector?
SI units
• Rate of change of velocity over time.
• A~ results from application of force(s).
• Vector
• m/(s^2)
24. Newton's 2nd Law
F=ma
25. On MCAT when you see Force, think
• Acceleration
• And when you see Acceleration, think Force.
• MCAT limits kinematics problems to those involving motion with constant acceleration.
26. Define and name examples of linear motion problems.

What are directions of v and a in linear motion?
Motion along a line.

Along a line (both v and a)

• Examples:
• (1) motion along a vertical path
• (2) motion along a horizontal path
• (3) motion along an inclined surface or ramp
27. Summary of kinematics equation (5 of them)
$vec v = vec v_0 + vec a t$

$vec{x}=vec{x}_0 + vec{v}_0 t+frac{vec{a}t^2}{2}$

$v^2 = v_0^2 + 2vec{a}cdot(vec{x}-vec{x}_0)$

Δx=1/2*(v0+v)*t = v(bar)*t

v(bar) = 1/2*(v0+v)
28. Projectile motion is...
Give an example.
...motion that follows a path along two dimensions.

Two dimensions (usually horizontal and vertical) are independent of each other and must be analyzed separately.

E.g.: cannonballs (pushka, zarbazani), baseballs, bullets...
 Author: it2007 ID: 222382 Card Set: Units & Kinematics I.txt Updated: 2013-06-04 15:01:28 Tags: mcat Kaplan Physics Units Kinematics Folders: Description: Units and Kinematics I Show Answers: