Answer:
Step-by-step explanation:
At a building site, an iron girder of mass 400 kg is suspended from a crane by a steel cable. Assume that the cable has a circular cross-section of diameter 24 mm.
a.What is the tensile force in newtons on the cable given that force = mass × g (where the acceleration due to gravity, g = 9.8 m s−2). Ignore the mass of the cable.(2 marks)
b.Calculate the cross-sectional area of the cable in square metres.(3 marks)
c.Show that the stress on the cable is 8.67 × 106 N m−2. Again ignore the mass of the cable.(3 marks)
d.If the Young’s modulus of the steel cable is 200 × 109 N m−2, calculate the strain in the cable.(3 marks)
e.When it is loaded with the iron girder, the steel cable stretches by 0.78 mm. Calculate what the original length of the steel cable was (i.e. its length prior to loading).(4 marks)
TOTAL: 15 marks
show working
Answer: D. 143
Step-by-step explanation:
31 times 4.26 = 132.06 + 10.908 = 142.968 which simplifies to 143 because you round up.
Answer:
8(x-3)=40
Step-by-step explanation:
Distribute: 8x-24=40
Add 24 to both sides: 8x=64
Divide both sides by 8: x=8
Hope this helps :D
Answer:
I believe n equals 13.
Step-by-step explanation:
Answer:
Well if it’s a regular box I’m sure it will fit, because a box of tissues is at least 10 inches long in diameter.
