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Laws of motion (I)
1) What is a Force? (or, why things move)
2) More on Reference Frames and Newtons 1st Law
3) Mass
4) Newtons 2nd Law
Why do Things Move?
Up until now we have been discussing Kinematics, or, how to describe the motion of objects
D
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Physics 151
Vectors
1) Coordinate Systems
X,y graph
-(x1,y1)
-any coordinate system is composed of orthogonal (perpendicular) directions
-Cartesian coordinates
-Polar Coordinates
- We use r and theta
-r = distance from the origin
-theta is the dist
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2D Motion (II)
1) More Projectiles
2) Uniform Circular Motion
3) Relative Motion
A Note on Notation
Y(t) = yi + vyit + (1/2)gt^2
G= -9.8
Y(t) = yi + vyit - (1/2)gt^2
G=9.8
Projectiles
X direction
Constant velocity
Xf= xi + vxit
Xf = 0 + vo cos thet