An airplane starts at rest and accelerates down the runway for 20 s. At the end of the runway, its velocity is 80 m/s north. Wha
1 answer:
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Answer:
The change in angular momentum is
Explanation:
From the question we are told that
The initial angular velocity of the spinning top is
The angular velocity after it slow down is
The time for it to slow down is
The rotational inertia due to friction is
Generally the change in the angular momentum is mathematically represented as
substituting values
Answer:
More energy
Explanation:
The amount of energy carried by a wave is related to the amplitude of the wave itself. In particular, the amount of energy carried by the wave is proportional to the square of the amplitude of the wave:
where
E is the energy
A is the amplitude
This means, for instance, that if the amplitude of a wave is doubled, the energy it carries increases by a factor 4.