physics

Classical Physics

Newton's Laws:

1. The motion of an object will remain the same unless it is acted

upon by a net Force ≠ 0

2. F = m*a

3. F_b on a = -F_a on b

Kinematics:

v_final = v_initial + a*t

s_final = s_initial + v_i*t + (1/2)*a*t^2

(v_f)^2 = (v_i)^2 + 2*a*delta(s)

Weight:

w = m*g

w_apparrent = w*(1+(a_y )/g)

Projectile Motion:

If a projectile lands @ the same height from which it was fired:

d = [(v_i)^2 * sin2theta]/g

Gravity causes things to fall at a rate of :

(1/2)*g*t^2 = h

Terminal Speed: [ A = Cross-sectional Area, D= drag, w = weight ]

v_t = sqrt((4*m*g)/A )

D = w

(1/4)*A*v^2 = m*g = w = D

Conservation of Momentum (p = m*v):

p_fa + p_fb = p_ia +p_ib

m_i * v_i = m_f * v_f

J_x = delta (p) = p_f - p_i

J_x = integrate( F(t) * dt, t_i, t_f ) = F_ave * delta(t)

Ballistic Pendulum:

1. Find height y

2. Solve for unknowns with equation

v_f = sqrt( 2*g*y_final )

3. Use momentum equations (above) to solve initial velocity

Modern Physics

Relativity: (physics of fast moving objects)

Quantum Mechanics: (physics of small things)