A60-kg motor sits on four cylindrical rubber blocks. each cylinder has a height of 3 cm and a cross-sectional area of 15 cm2. the shear modulus for this rubber is 2.0 mpa. a.) if a sideways force of 300 n is applied to the motor, how far will it move sideways? b.) with what frequency will the motor vibrate back and forth sideways if disturbed?

Part a)

Part b)

Explanation:

Part a)

As we know that shear modulus is given as

now we have

here we have

now we have

Part b)

As we know that

now the frequency of oscillation is given as

here we know

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

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