Libros De Todo
Páginas: 31 (7678 palabras)
Publicado: 15 de julio de 2012
3 Solutions 44918
1/21/09
4:25 PM
Page 121
© 2010 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. This material is protected under all copyright laws as they currently exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
•3–1. Determine the force in each cord for equilibrium of the200-kg crate. Cord BC remains horizontal due to the roller at C, and AB has a length of 1.5 m. Set y = 0.75 m.
2m A y
C
B
121
3 Solutions 44918
1/21/09
4:25 PM
Page 122
© 2010 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. This material is protected under all copyright laws as they currently exist. No portion of this material may be reproduced,in any form or by any means, without permission in writing from the publisher.
3–2. If the 1.5-m-long cord AB can withstand a maximum force of 3500 N, determine the force in cord BC and the distance y so that the 200-kg crate can be supported.
2m A y
C
B
122
3 Solutions 44918
1/21/09
4:25 PM
Page 123
© 2010 Pearson Education, Inc., Upper Saddle River, NJ. All rightsreserved. This material is protected under all copyright laws as they currently exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
3–3. If the mass of the girder is 3 Mg and its center of mass is located at point G, determine the tension developed in cables AB, BC, and BD for equilibrium.
FAB A B 45 C G 30 D123
3 Solutions 44918
1/21/09
4:25 PM
Page 124
© 2010 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. This material is protected under all copyright laws as they currently exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
*3–4. If cables BD and BC can withstand a maximumtensile force of 20 kN, determine the maximum mass of the girder that can be suspended from cable AB so that neither cable will fail. The center of mass of the girder is located at point G.
45 C
FAB A B 30 D G
124
3 Solutions 44918
1/21/09
4:25 PM
Page 125
© 2010 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. This material is protected under all copyrightlaws as they currently exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
•3–5. The members of a truss are connected to the gusset plate. If the forces are concurrent at point O, determine the magnitudes of F and T for equilibrium. Take u = 30°.
A 8 kN u 45 D B T C 5 kN O
F
3–6. The gusset plate issubjected to the forces of four members. Determine the force in member B and its proper orientation u for equilibrium. The forces are concurrent at point O. Take F = 12 kN.
A 8 kN u
O
45 D B T C 5 kN
F
125
3 Solutions 44918
1/21/09
4:25 PM
Page 126
© 2010 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. This material is protected under all copyright lawsas they currently exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
3–7. The towing pendant AB is subjected to the force of 50 kN exerted by a tugboat. Determine the force in each of the bridles, BC and BD, if the ship is moving forward with constant velocity.
D
C 30
20
B
A 50 kN
126
3Solutions 44918
1/21/09
4:25 PM
Page 127
© 2010 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. This material is protected under all copyright laws as they currently exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
*3–8. Members AC and AB support the 300-lb crate. Determine the...
1/21/09
4:25 PM
Page 121
© 2010 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. This material is protected under all copyright laws as they currently exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
•3–1. Determine the force in each cord for equilibrium of the200-kg crate. Cord BC remains horizontal due to the roller at C, and AB has a length of 1.5 m. Set y = 0.75 m.
2m A y
C
B
121
3 Solutions 44918
1/21/09
4:25 PM
Page 122
© 2010 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. This material is protected under all copyright laws as they currently exist. No portion of this material may be reproduced,in any form or by any means, without permission in writing from the publisher.
3–2. If the 1.5-m-long cord AB can withstand a maximum force of 3500 N, determine the force in cord BC and the distance y so that the 200-kg crate can be supported.
2m A y
C
B
122
3 Solutions 44918
1/21/09
4:25 PM
Page 123
© 2010 Pearson Education, Inc., Upper Saddle River, NJ. All rightsreserved. This material is protected under all copyright laws as they currently exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
3–3. If the mass of the girder is 3 Mg and its center of mass is located at point G, determine the tension developed in cables AB, BC, and BD for equilibrium.
FAB A B 45 C G 30 D123
3 Solutions 44918
1/21/09
4:25 PM
Page 124
© 2010 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. This material is protected under all copyright laws as they currently exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
*3–4. If cables BD and BC can withstand a maximumtensile force of 20 kN, determine the maximum mass of the girder that can be suspended from cable AB so that neither cable will fail. The center of mass of the girder is located at point G.
45 C
FAB A B 30 D G
124
3 Solutions 44918
1/21/09
4:25 PM
Page 125
© 2010 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. This material is protected under all copyrightlaws as they currently exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
•3–5. The members of a truss are connected to the gusset plate. If the forces are concurrent at point O, determine the magnitudes of F and T for equilibrium. Take u = 30°.
A 8 kN u 45 D B T C 5 kN O
F
3–6. The gusset plate issubjected to the forces of four members. Determine the force in member B and its proper orientation u for equilibrium. The forces are concurrent at point O. Take F = 12 kN.
A 8 kN u
O
45 D B T C 5 kN
F
125
3 Solutions 44918
1/21/09
4:25 PM
Page 126
© 2010 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. This material is protected under all copyright lawsas they currently exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
3–7. The towing pendant AB is subjected to the force of 50 kN exerted by a tugboat. Determine the force in each of the bridles, BC and BD, if the ship is moving forward with constant velocity.
D
C 30
20
B
A 50 kN
126
3Solutions 44918
1/21/09
4:25 PM
Page 127
© 2010 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. This material is protected under all copyright laws as they currently exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
*3–8. Members AC and AB support the 300-lb crate. Determine the...
Leer documento completo
Regístrate para leer el documento completo.