Apoint at the end of a propeller has a centripetal acceleration of 532.6 m/s^2.
if the velocity of the propeller at this point is 35 m/s how long is the propeller blade?
a. 2.1m
b. 2.5m
c. 2.3m
d. 1.9m

C. 2.3 m

Explanation:

Centripetal acceleration is:

a = v² / r

Given a = 532.6 m/s² and v = 35 m/s:

532.6 m/s² = (35 m/s)² / r

r = 2.3 m

r = 2.3 meters

Explanation:

Solution,

Given that,

Centripetal acceleration of the propeller,

Velocity of the propeller, v = 35 m/s

To find,

Length of the propeller blade.

Solution,

The centripetal acceleration is given by :

r is the radius of propeller

r = 2.3 meters

So, the length of the propeller is 2.3 merets.

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