F = m * a
F = 15 kg * 8 m/s²
F = 120 N
Answer B
hope this helps
Answer:
Kinda? Depends what the question is fully asking
Explanation:
Acceleration is a change in velocity. So I guess if the velocity of something is -2 m/s and its positively accelerating at a value of +1 m/s, then that means every second its velocity changes by +1m/s.
So that -2 m/s thing after one second will be going -1 m/s.
After another second it'll be going 0 m/s.
After another itll be going +1 m/s and so on.
So at one point for a brief moment, it can have an acceleration but be at 0 m/s velocity.
Answer:
No change
Explanation:
In a simple harmonic motion, we have that
y = A sin(wt), where
w is the said angular frequency
The angular frequency w, is given as √(k/m)
If the amplitude, A is doubled it will have no corresponding effect on the angular frequency, w, because they do not depend on each other. A is independent of w, and w is independent of A. And as such, no matter the change in either, it doesn't affect the other
Refractive index of a medium = speed of light in vacuum
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speed of light in that medium