Friday 11 SEP: (Free Response day)

Key Concept: Review Ch 7-10

Journal:

1. Freely falling bodies can only move downward.

2. Put resultant vector into rectangular then polar form:

x₁  = 10,   y₁  =  -7

x₂  = -12,   y₂  = 23

x₃  =  -6,   y₃  =  2

x = ______    y = ________     à   à    ______ ∟_____⁰

3. You bike east @ 20km/hr due for 30mins. Then head south @ 30km/hr for 1.0 hr. Then you head east again @ 20km/hr for 30mins. Finally, you head west at 40 km/hr for 2 hrs. (show diagram): 

1. Speed

2. Displacement

3. Velocity

 1. False. in physics, the state of a body moving solely under the influence of gravitational forces

2. Put into rectangular then polar form :

x₁  = 10,   y₁  =  -7

x₂  = -12,   y₂  = 23

x₃  =  -6,   y₃  =  2

x = -8   y = -18    à   à     19.7 ∟114 ⁰

3. You bike east @ 20km/hr due for 30mins. Then head south @ 30km/hr for 1.0 hr. Then you head east again @ 20km/hr for 30mins. Finally, you head west at 40 km/hr for 2 hrs.

a.     Speed  32.5 km/hr

b.      Displacement

67.1 ∟206.6 ^{0  km}

c.       Velocity

16.8 ∟206.6 ^{0  km/hr}

One Free Response (F.R.) Question due Monday 14 Sep