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1.8x 10^4
This is 18000 expressed in scientific notation.
Answer:
α = 3.27 rad/s²
No
Explanation:
Given that
L= 3 m
Lets take mass of tree = m kg
The torque to mass m = m g .L
The mass moment of inertia of tree ,I
I = mL² kg.m²
We know that
τ = I α
m g .L = mL² .α
α= g/L
Now by putting the value

α = 3.27 rad/s²
No we can find the mass of the from the above information because angular acceleration is not depend on the mass of tree.
Collecting light and bringing it to focus.