A100 kg object hangs from two steel cables, both with radius 1.2 mm. the first cable is 2.5 m long and 2 mm shorter than the second, but the object is horizontal (so they are now the same length). what is the force on the first cable? young's modulus for steel is 2.0 x 1011 n/m2.a : 470 nb : 500 nc : 850 nd : 1000 n

850N

Explanation:

The step by step is in the attachment.

the answer is b ) square root of 5

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day