The larger the push, the larger the change in velocity. This is an example of Newton's Second Law of Motion which states that th
1 answer:
You might be interested in
Answer:
ωf = 13 rad/s
Explanation:
- The angular acceleration, by definition, is just the rate of change of the angular velocity with respect to time, as follows:
- α = Δω/Δt = (ωf-ω₀) / (tfi-t₀)
- Choosing t₀ = 0, and rearranging terms, we have
where ω₀ = 5 rad/s, t = 4 s, α = 2 rad/s2
- Replacing these values in (1) and solving for ωf, we get:
- The wheel's angular velocity after 4s is 13 rad/s.
Answer:
Both rod have the same tensile stress
Explanation:
Given information,
The weight first rod, = 1000 N
The length of first rod, = 2.0 m
The weight second rod, = 500 N
The length of second rod, = 1.0 m
The equation of tensile stress, σ =
where
σ = tensile stress (N/ or Pa)
F = Force (N)
A = Area (N/ or Pa)
so
σ1 = , A = 2πl
=
= N/
now calculate σ2
σ2 =
=
= N/
σ1/σ2 = /
σ1/σ2 = 1
σ1 = σ2
Hence, the tensile stress of first and second rod are the same.