Homework:
C.O.M. & 2D momentum
- Ex 4A, p.100-102, C.O.M.
- Ex 4B, p.108-112, Momentum & C.O.M. in 1D
- Ex 4C, p.116-122, Momentum & C.O.M. in 2D
- Act 7A, p.87-88 Motion, Force and Energy
- Act 7B, p.91-92 Impulse
- Act 7C, p.95-96 Conservation of Momentum
- Act 7D, p.100-101 C.O.M.
Circular Motion
- Act 8A, p.120-121 Horizontal Circles and Banked Corners
- Act 8B, p.124-125 Vertical Circles
- Act 8C, p.129 Sattelites
- Ex 4D, p.128-131, Banked Corners (Circular Motion)
- Ex 4E, p.138-142, Vertical Circles
- Ex 4F, p.145-147, Gravity
- Ex 4G, p.153-156 Satallites
Rotational Motion
- Act 9A, p. 128-129, Angular Motion
- Ex 4H, p.160-162, Rotational Kinematics
Radians
Radian Measure is used so that we can easily calculate an arc length, d (m), given an angle, š (Rad) and the radius, r (m).
d = rš
This in turn allows us to relate velocity, v (ms-1) to angular velocity ⍵ (rads-1), in the same way. Note that Angular Velocity may also be called Angular Frequency.v = r⍵,
also ⍵ = 2š f
This also allows us to relate acceleration, a (ms-2), to angular acceleration, Ī± (rads-2), in the same way.a = rĪ±
The rotational kinematics work just like the translational kinematic equations when there is a constant acceleration.
Rotational Kinematics Review
