1.
Homework

5. Pendulum 1 2 3 KE
PEg W KE
PEg W KE
PEg + - 1 3 2

6. No Friction 1 1 3 2
KEi
PEsi W
KEf
PEsf W
KEi
PEsi 2 + - 3 4 5

7. No Friction x = A×cos(K×time) position time 1 2 3 4 5 A – A A
x = A×cos(K×time)
– A
position A
amplitude
time
– A
Period T

8. V = Vmax×cos(K×time + π)
No Friction 1 2 3 4 5 A
V = Vmax×cos(K×time + π)
– A
velocity A
time
– A

9. No Friction a = amax×cos(K×time) acceleration time 1 2 3 4 5 A – A A
a = amax×cos(K×time)
– A
acceleration A
amplitude
time
– A
Period T

10. No Friction x = A×cos(K×time) K = 2π/T position time 1 2 3 4 5 A – A
x = A×cos(K×time)
– A
K = 2π/T
Variables?
position A
Mass
Spring constant
amplitude
time
– A
Period T

11. Variables?
Pendulum
Mass?
Length
Gravity 1 3 2

13. A pendulum is launched in two different ways
A pendulum is launched in two different ways. During both launches, the bob has an initial speed of 3.0 m/s.
On launch 1, the speed is up
On launch 2, the speed is down
Which launch will cause the pendulum to swing the largest angle from the equilibrium position on the left side?