The chair is exerting a force of 800N.
Force is a quantity that is used to describe the interaction between two objects. Forces can cause objects to accelerate, decelerate, or change direction. In other words, forces can cause objects to move or change the way they are moving. The weight of an object is a measure of the force of gravity on that object and is calculated by multiplying the object's mass by the acceleration due to gravity.
In the given case, It would need a force equal to his weight (800 N) pressing in the opposite direction for the man to be able to rise up in the chair. Therefore, the 800 N force would be pushed upwards if he were to press down by standing on it.
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Answer:
the formula is force = mass . acceleration
The answer is D. Scientists often use models to show how something works
Answer:
Explanation:
a) capacitive reactance Xc = 1/2πfC
f is the frequency of the AC source
C is the capacitance of thw capacitor
Given f = 60.0Hz
C = 12.2-µF
C = 12.2 × 10^-6Farads
Xc = 1/2π×60×12.2×10^-6
Xc = 1/0.004599
Xc = 217.44ohms
b) Using the formula Vrms = IrmsXc Vrms
Irms = Vrms/Xc
Irms = 27.0/217.44
Irms = 0.124Amperes
c) Since Irms = Im/√2
Where Im is the maximum current
Im = Irms×√2
Im = 0.124× √2
Im = 0.088A
d) No, the capacitor has no charge when the current is at maximum.
Yes, because imagine a car, as it races it has a positive acceleration. So imagine the car going faster, and at the point it is at and imagine it slowing down. Compared to its previous speed is it a positive or negative acceleration (after it slowed down)?
Negative.
this is because its speed is decreasing. When anything is decreasing it is negative.
In other words its speed is decreaseing meaning its having a negative acceleration
