Physics 12 - Quiz #4 
Two-Dimensional Dynamics

Solution:

Free-Body Diagrams

a) Draw and label the free-body diagram for each mass. (3 marks)

 
10 kg: 25 kg: 20 kg:

b) Write the equation described by each vector diagram above. (3 marks)

10 kg: 25 kg: 20 kg:
 

FNET = T1 - FF - Fg1 // = 10a

 

FNET = T2 - T1 = 25a

 

FNET = Fg3// - T2 - FF3 = 20a

c) What is the acceleration of the system? (6 marks)

d) What is the tension in each rope, T1 and T2. (3 marks)

 

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