MC Traffic Light
A traffic light consists of a horizontal member attached to a vertical support post. The horizontal member extends 7 m to the left of the support post and has a constant mass density of 15 kg/m. Each traffic light has mass of 10 kg, and the street sign has a mass of 5 kg. Make sure the connection between the horizontal member and the vertical support post is strong enough to withstand the forces exerted on the horizontal member. Calculate the effects of the forces resulting from the two traffic lights and the street sign on the horizontal member.
7. To determine the overall translational effects on the horizontal member, what must be done? (Translational effects refer to the tendency of an object to want to slide along a line due to the application of a force.)
Sum the forces of the two lights and the sign on the horizontal member.
Sum all of the forces on the horizontal member.
Sum all of the forces and moments on the horizontal member.
Sum all of the masses on the horizontal member.
Sum all of the moments on the horizontal member.
Homework Answers
Problem 4 A traffic light hangs from a pole as shown in the figure. The uniform...
Problem 4 A traffic light hangs from a pole as shown in the figure. The uniform aluminum pole AB is 7.20 m long and has a mass of 12.0kg. The mass of the traffic light is 21.5kg. Determine (a) the tension in the horizontal massless cable CD, and (b) the vertical and horizontal components of the force exerted by the pivot A on the aluminum pole. 370 3.80 m
A traffic light hangs from a pole. The uniform aluminum pole AB is 7.3m long and...
A traffic light hangs from a pole. The uniform
aluminum pole AB is 7.3m long and has a mass of 10kg. The mass of
the traffic light is 22.5kg.
A. Determine the tension in the horizontal massless
cable. CD
B. Determine the vertical component of the force exerted by the
pivot A on the aluminum pole.
C. Determine the horizontal component of the force exerted by the
pivot A on the aluminum pole.
37° 3.80 m
The given steel vertical pole supports 3 traffic lights and a visibility light. The visibility light...
The given steel vertical pole supports 3 traffic lights and a visibility light. The visibility light is directly above the nearest traffic light. The weight of each traffic light is Wild and the weight of the visibility light is W. 15. The unit weight of steel is y lb/ft'. The cross-section of each support pole is hollow and is shown below. Replace the traffic light structure and lighting with an equivalent system at O. Calculate: W lb 10ft AB W...
A) A traffic light is hanging from two cables. Cable #1 pulls up and left, making...
A) A traffic light is hanging from two cables. Cable #1 pulls up and left, making an angle of 25o with the horizontal on the left, and cable #2 pulls up and to the right with a force of 180 N, making an angle of 45o with the horizontal on the right. Find the mass of the traffic light. B) At the park, a 4 m long seesaw is supported in the middle.A 35 kg child sits at the far...
27. A sign of mass 100.0 kg is hanging by a cable from the end of...
27. A sign of mass 100.0 kg is hanging by a cable from the end of a support rod 0.400 m long. The support rod is perpendicular to the wall. Another cable, making an angle of 60 with the wall, is attached to the end of the support rod. The support rod has a mass of 36.0 kg, and has uniform density so its center of mass is in the middle of the rod. a. Calculate the tension in the...
PRACTICE T Use the worked example above to help you solve this problem. A traffic light...
PRACTICE T Use the worked example above to help you solve this problem. A traffic light weighing 1.01 X 102 N hangs from a vertical cable tled to two other cables that are fastened to a support, as shown in Figure (a). The upper cables make angles of 0, -35.5 and 02 -54.5e with the horizontal. Find the tension in each of Ti Your respo 7 have a mistake in your calculation. Carry out alfintermediate results to at least four-digit...
2) See Figure 2. A 35 kg sign is suspended from the end of a uniform...
2) See Figure 2. A 35 kg sign is suspended from the end of a uniform horizontal beam that has a mass of 25 kg and a length of 3.0 m. The beam is attached to a wall by a hinge. A cable with negligible mass is attached to the end of the beam just above the sign and extends to the wall, forming an angle of 30° with the beam. cable beam Physics is Phun Figure 2 a) Sketch...
See Figure 2. A 35 kg sign is suspended from the end of a uniform horizontal...
See Figure 2. A 35 kg sign is suspended from the end of a uniform horizontal beam that has a mass of 25 kg and a length of 3.0 m. The beam is attached to a wall by a hinge. A cable with negligible mass is attached to the end of the beam just above! the sign and extends to the wall, forming an angle of 30° with the beam. cable beam Physics is Phun Figure 2 WT 1173337 a)...
Physics 211 Test Five Spring 2018 Name A disc is supported so that it freely rotates...
Physics 211 Test Five Spring 2018 Name A disc is supported so that it freely rotates 10 kg and a radius nf Physics 211 Test Five Spring 2018 A boom 37 degrees above the horizontal is supported by a fixed support in the wall. The boom is 5 meters long and has a mass of 10 kg. If the horizontal component of the wall support is determined to be 8 N directed horizontally to the right and the tension in...
3. An experiment is set up as shown in Figure Q3 to measure the moment of...
3. An experiment is set up as shown in Figure Q3 to measure the moment of inertia of a circular flywheel. The mass of 30 kg is attached to a light inextensible string which is wrapped around the outer diameter of the flywheel which has a radius of 0.4 m. The mass is released when the system is at rest and drops 5.4 m in a time of 3 seconds. Friction in the bearings can be neglected Flywheel Bearing 30...
Problem 4 A traffic light hangs from a pole as shown in the figure. The uniform aluminum pole AB is 7.20 m long and has a mass of 12.0kg. The mass of the traffic light is 21.5kg. Determine (a) the tension in the horizontal massless cable CD, and (b) the vertical and horizontal components of the force exerted by the pivot A on the aluminum pole. 370 3.80 m
A traffic light hangs from a pole. The uniform
aluminum pole AB is 7.3m long and has a mass of 10kg. The mass of
the traffic light is 22.5kg.
A. Determine the tension in the horizontal massless
cable. CD
B. Determine the vertical component of the force exerted by the
pivot A on the aluminum pole.
C. Determine the horizontal component of the force exerted by the
pivot A on the aluminum pole.
37° 3.80 m
The given steel vertical pole supports 3 traffic lights and a visibility light. The visibility light is directly above the nearest traffic light. The weight of each traffic light is Wild and the weight of the visibility light is W. 15. The unit weight of steel is y lb/ft'. The cross-section of each support pole is hollow and is shown below. Replace the traffic light structure and lighting with an equivalent system at O. Calculate: W lb 10ft AB W...
27. A sign of mass 100.0 kg is hanging by a cable from the end of a support rod 0.400 m long. The support rod is perpendicular to the wall. Another cable, making an angle of 60 with the wall, is attached to the end of the support rod. The support rod has a mass of 36.0 kg, and has uniform density so its center of mass is in the middle of the rod. a. Calculate the tension in the...
PRACTICE T Use the worked example above to help you solve this problem. A traffic light weighing 1.01 X 102 N hangs from a vertical cable tled to two other cables that are fastened to a support, as shown in Figure (a). The upper cables make angles of 0, -35.5 and 02 -54.5e with the horizontal. Find the tension in each of Ti Your respo 7 have a mistake in your calculation. Carry out alfintermediate results to at least four-digit...
2) See Figure 2. A 35 kg sign is suspended from the end of a uniform horizontal beam that has a mass of 25 kg and a length of 3.0 m. The beam is attached to a wall by a hinge. A cable with negligible mass is attached to the end of the beam just above the sign and extends to the wall, forming an angle of 30° with the beam. cable beam Physics is Phun Figure 2 a) Sketch...
See Figure 2. A 35 kg sign is suspended from the end of a uniform horizontal beam that has a mass of 25 kg and a length of 3.0 m. The beam is attached to a wall by a hinge. A cable with negligible mass is attached to the end of the beam just above! the sign and extends to the wall, forming an angle of 30° with the beam. cable beam Physics is Phun Figure 2 WT 1173337 a)...
Physics 211 Test Five Spring 2018 Name A disc is supported so that it freely rotates 10 kg and a radius nf Physics 211 Test Five Spring 2018 A boom 37 degrees above the horizontal is supported by a fixed support in the wall. The boom is 5 meters long and has a mass of 10 kg. If the horizontal component of the wall support is determined to be 8 N directed horizontally to the right and the tension in...
3. An experiment is set up as shown in Figure Q3 to measure the moment of inertia of a circular flywheel. The mass of 30 kg is attached to a light inextensible string which is wrapped around the outer diameter of the flywheel which has a radius of 0.4 m. The mass is released when the system is at rest and drops 5.4 m in a time of 3 seconds. Friction in the bearings can be neglected Flywheel Bearing 30...
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