Here are some helps for the PreSheet to Hershey - Enjoy!! CRuths

Pictures from May 2008

Kinematics
1. v = x/t
2. v = at
3. x = 1/2 at^2
4. x = d/t
b. v(i) + v (f) /2
5. same as 3
6. v(f) = v(i) + at
b. v(ave) x t
7. v=x/t
8. v = x/t
9. x = v(i) + 1/2at^2
10. same as 9
b. v(f)^2 = v(i)^2 + 2ax
c. use sin
11. c = 2pr

Newtons Law
1. height/length
f x length = mgh
2.
3. F(delta)t = m (delta)v
4. Vector diagram
5. t
b. v
c. F(c)
d. Friction = mg
friction = (Mu) x Normal force
6. P(before) = mv
b. P(before) = mv
c.
d.

7. Vector diagram
b.
c.
8. p(i) = mv
b. p(f)
c. impulse = (delta)p
d. J = F (delta) t
e. force
9. a = (delta) v/ t
b. F = ma
c.
d. Ft = (delta) mv = (delta) P


Swinging and Spinning

1. tan (angle) = mgR/mv^2
b. T=mg/sin(angle)
2. tan (angle) = gR/v^2
b. T = mg/sin (angle)
3. tan (angle) = gR/v^2
b. T = mg/sin (angle)
c.
d. T =
4. see 2
5. F(friction) = mg
b. F(friction) = (mu)N
c. N = mv^2/R
6. F(friction)
b. N
c. v
7. (mu)N = mg
8. v
b. F(friction) = mg
c. F(c) = mv^2/R
d. Mu = F(friction) /N N=F(c)
e.

Roller Coaster
Energy units = Joules
PE = mgh h=height
KE = 1/2 mv^2
Total E = PE + KE
#3-4 Mass = 50 kg
F(centripetal) = mv^2/r
F(track) = +- F(weight) + F(centripetal)
Force factor = F(track)/F(weight)