What are possible units for impulse? Check all that apply.
2 answers:
Units of impulse: N • s, kg • meters per second
Explanation:
Impulse is defined in two ways:
1)
Impulse is defined as the product between the force exerted in a collision and the duration of the collision:
where
F is the force
is the time interval
Since the force is measured in Newtons (N) and the time is measured in seconds (s), the units for the impulse are
So,
N • s
2)
Impulse is also defined as the change in momentum experienced by an object:
where the change in momentum is given by
where m is the mass and is the change in velocity.
The mass is measured in kilograms (kg) while the change in velocity is measured in metres per second (m/s), therefore the units for impulse are
so,
kg • meters per second
Learn more about impulse:
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Answer:
a)
b)
Explanation:
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- initial rotational speed of phonograph,
- final rotational speed of phonograph,
- time taken for the acceleration,
a)
Now angular acceleration:
b)
Using eq. of motion:
Answer:
Alternating; direct.
Explanation:
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Mathematically, Ohm's law is given by the formula;
Where;
V represents voltage measured in voltage.
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R represents resistance measured in ohms.
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Basically, the direction of an alternating current changes periodically.