Unit 2 - Physics - 12 PDF

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Physics 12

Torque and Equilibrium Send-In Assignment

On-Line Course

SEND - IN ASSIGNMENT TORQUE AND EQUILIBRIUM

Name: _________________________________________

Teacher:________________________________________

School:_________________________________________

Total ______

=

_________%

56

SHOW ALL WORK FOR FULL MARKS (when possible) Draw neat, fully labelled Torque Diagrams when asked.

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Torque and Equilibrium

Physics 12

Torque and Equilibrium Send-In Assignment

1. A camper is trying to move a rock by creating a lever out of a 6.82 m-long steel pipe and another rock. Using the second rock as a fulcrum, he places it 1.47 m from the first rock. How much torque will he exert if he applies a force of 215 N:

On-Line Course

Fapp =215 N a) b)

1.47 m

45.0°

a) perpendicular to the pipe?

a) 2 marks

b) at 45 to the pipe?

b) 2 marks

2. A fulcrum is placed 1.2 m from the edge of a 3.8 m-long wooden uniform plank of mass 25 kg. A 17 kg mass is placed at the edge of the short end. Determine the net torque (including direction) acting on the plank, relative to the pivot. (Torque Diagram)

17 kg

1.2 m 3.8 m

2. 3 marks

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Torque and Equilibrium

Physics 12

Torque and Equilibrium Send-In Assignment

3. Determine the unknown mass m in the mobile diagram to the right. Assume the beams are horizontally balanced and have negligible mass.

On-Line Course

0.34 m

0.26 m

m=? 1.5 kg

2.1 kg

3. 3 marks

4. Describe the conditions that must exist in order for any object to be in static equilibrium.

2 marks

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Torque and Equilibrium

Physics 12

Torque and Equilibrium Send-In Assignment

5. A uniform rectangular crate that weighs 1490 N is 6.00 m tall and 2.20 m wide. If a student attempts to push the crate forward with a horizontal force of 1030 N, how high up can this force be applied without tipping over the crate?

On-Line Course

2.20 m 1030 N 6.00 m ?

5. 4 marks

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Torque and Equilibrium

Physics 12

Torque and Equilibrium Send-In Assignment

6. In the diagram to the right, the mass of the 4.50 m-long uniform, horizontal beam is 13.0 kg.

On-Line Course

A

B 25.0 kg

What is the tension in each cable A and B that supports the load? (Torque Diagram)

3.70 m

6. 6 marks

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Torque and Equilibrium

Physics 12

Torque and Equilibrium Send-In Assignment

7. A hiker of mass 65.0 kg attempts to walk across a fallen 11.4 m-long uniform log of mass 118 kg from X to Y, as shown to the right.

On-Line Course

d=? X

Y

However, the bank at Y is unstable, and can only supply a supporting upward force of 985 N before collapsing. unstable How far from X will the hiker get before the bank at Y gives way? (Torque Diagram)

7. 5 marks

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Torque and Equilibrium

Physics 12

Torque and Equilibrium Send-In Assignment

8. Examine the diagram to the right. Given that the 18 kg uniform beam has a length of 4.2 m, determine the tension in the diagonal support wire. (Torque Diagram)

On-Line Course

66°

FT = ?

3.8 m 85 kg

8. 5 marks

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Torque and Equilibrium

Physics 12

Torque and Equilibrium Send-In Assignment

9.

2.7 m

On-Line Course

Examine the diagram to the left. The horizontal, uniform 3.6 m-long beam has a mass of 35 kg, and the diagonal support beam supplies a force of 6.3 x 103 N to hold the system in place.

1.2 m



168 kg

Determine the angle  between the two beams. (Torque Diagram)

9. 5 marks

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Torque and Equilibrium

Physics 12

Torque and Equilibrium Send-In Assignment

10.

On-Line Course

9.8 m A 33 6.8 m

In the left diagram, the uniform 15 m-long beam has a mass of 1.3 x 103 kg, and is lifting a 2.2 x 103 kg load. All lengths are measured from the pivot.

9.2 m 2.2 x 103 kg

Calculate the tension in cable A. Note that the two cables on the right effectively cancel their torques. (Torque Diagram)

10. 5 marks

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Torque and Equilibrium

Physics 12

Torque and Equilibrium Send-In Assignment

On-Line Course

11. In the diagram to the right, the cable attaching the 13.8 m-long beam to the wall has a tension force of 895 N. The beam is uniform, with a mass of 28.0 kg. Determine the mass m of the sign that hangs from the end of the beam. (Torque Diagram)

4.2 m 77.0°

68.0°

m

11. 7 marks

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Torque and Equilibrium

Physics 12

Torque and Equilibrium Send-In Assignment

On-Line Course

12. A uniform 5.0 m-long ladder of mass 25 kg leans against a frictionless wall at an angle of 62 with the floor.

Determine the minimum coefficient of static friction needed on the floor for the ladder not to slide. (Torque Diagram) 62°

12. 7 marks

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Torque and Equilibrium...