Engineering Answers

The baggage truck A has a mass of 800 kg and is used to pull each of the 300-kg cars. If the tractive force F on the truck is = 480 N, determine:

a) The initial acceleration of the truck.

b) Forces in coupling B and C.

c) What is the acceleration of the truck if the coupling at C suddenly fails?

The car wheels are free to roll. Neglect the mass of the wheels.

answer asap.

10. In a curved prestressed bridge, how should the guided bearings in piers of the curved region be oriented with respect to the fixed bearing in abutment?

5. What are the advantages of assigning the central pier and the abutment as fixed piers?

6. Sometimes the side of concrete bridges is observed to turn black in colour. What is the reason for this phenomenon?

The support B in the overhanging beam shown in Figure 11.24 sinks by 1 mm. If El = 300000 kNm*, determine the prop reaction.  

The free end ofa cantilever is supported by a 10 mm diametre steel wire. Determine the force in wire and maximum bending moment in the beam when the cantilever is subjected to a uniformly distributed load of intensity 40 kN/m over its entire length (Figure 11.25). Given, flexural rigidity of beam = 1 x 10" Nmm®*, Young's Modulus of the steel wire = 2 « 10° Nimm*.  

Redefine each piecewise function into the Heaviside function and find its Laplace transform.

𝑓(𝑡) ቄ

1, 0 ≤ 𝑡 < 5;

𝑒

−(𝑡−2), 𝑡 ≥ 5.

Redefine each piecewise function into the Heaviside function and find its Laplace transform.

𝑓(𝑡) ൝

1, 0 ≤ 𝑡 < 1;

4, 1 ≤ 𝑡 < 2

0, 𝑡 ≥ 2

Redefine each piecewise function into the Heaviside function and find its Laplace transform.

1. 𝑓(𝑡) ൝

0, 0 ≤ 𝑡 < 2;

2, 2 ≤ 𝑡 < 3

3, 𝑡 ≥ 3