Tuesday (19 Oct):

Key Concept(s) Today: Torque

Journal: What is torque?

L #9: 1- 8,  11-16    Due Wed 20 Oct (Torque)

L #12: 1- 14,  16, 17    Due Fri 22 Oct (Work & Power)

L #13: 1- 13,  18, 19    Due Wed 27 Oct (Instantaneous Vel & Acc)

Notes: Torque = (Force x Distance)

 

 

Find mass of object A:

 

                     A

 

 

 

 

                                    4m                      10m

 

 

 

 

 

 

 

 

 

 

 CCWt = CWt

 (F_A)(x_A) =   (F_25kg)(x_20kg)

(F_A)(4m) = (250N)(10m)

(F_A)(4m) = (2,500Nm)

 

          F_A    =      625N or 62.5 kg

 

 

 

 

 

 

Find forces A & B

 

 

 

                                                                                              (F₁)

                                                                                100N

 

 

                                         5m            2m       3m

             A                   (W)            B

                             50N

 

 

 

 

 

 

 

 

 

       CCWt = CWt + CWt

(F_B)(x) =   (W)(x_w) + (F₁)(x₁)

(F_B)(10m) = (50N)(5m) + (100N)(7m)

(F_B)(10m) = (250Nm) + (700Nm)

          F_B    =      95N

     F_A + F_B    =   150N

    F_A + 95N  =   150N 

           F_A   =   55N

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Finish film: Cold