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:
equation: Vf=Vo - at
t= (Vf- Vo)/a
t=(0m/s - 18m/s)/(-2.5m/s²)
t= 7.2 s
Density of cylinder is 4.82 g/cm³.
<h3>What is density of a substance?</h3>
Density is the ratio of the mass and the volume of a substance
The density of the cylinder is:
mass of cylinder = 50.12 g
volume of cylinder = πr²h
r = 1.62/2 = 0.81 cm
h = 5.04 cm
volume of cylinder = 22/7 * 0.81² * 5.04
volume of cylinder = 10.39 cm³
Density of cylinder = 50.12 g/10.39 mL
Density of cylinder = 4.82 g/cm³
In conclusion, density of a substance is the ratio of mass and volume of the substance.
Learn more about density at: brainly.com/question/1354972
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Answer:
weight on Venus = 604.15 N
weight on Venus = 252.01 N
Explanation:
Given:
Weight on the earth , W = 150 lbs
now,
1 lbs = 4.45 N
thus,
W = 150 × 4.45 = 667.5 N
now, mass on the earth, m = 667.5/9.8 = 68.11 kg
now,
⇒ weight on Venus,
the acceleration due to gravity on venus = 8.87 m/s²
thus,
weight on Venus = mass × acceleration due to gravity on venus
or
weight on Venus = 68.11 × 8.87 = 604.15 N
⇒ weight on mars,
the acceleration due to gravity on mars = 3.70 m/s²
thus,
weight on Venus = mass × acceleration due to gravity on venus
or
weight on Venus = 68.11 × 3.70 = 252.01 N
