Friday 10 SEP:

("Free Response Friday")

 

Key Concept: Vectors

Last day for extra credit $ (Lab Fee)

 

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 by diagram & solve): 

  1. Speed

 

  1. Displacement

 

 

  1. 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

 

 

 

 

 

(Quiz): Free Response Question

 on Monday 14 Sep

 

 

 

 

 

Quiz (1st Equations) on Monday 20 Sep :

     

1. (Relationship between work and energy)

   W =

 

2.     (net force – Newton’s 2nd law)

   SF =

 

 

3.   (Definition of acceleration- relationship with velocity)

     a =

 

4.      (Distance after a period of time)

     Xf =

 

5.     (Velocity after a period of time)

      Vf=

 

6.     (Velocity/distance/acceleration without time)

    Vf2     =

 

7.     (Mechanical Work)

   W =

 

8.     (Force of friction)

    Ffrict =

 

9.     (Kinetic Energy)

    KE =

 

10.     (Potential Energy)

        DUg =

 

 

11.   (Definition of Linear momentum)

          r =

 

12.   (Definition of change of momentum and Impulse)

         Dr =