Answer: current I = 1.875A
Explanation:
If the resistors are connected in series,
Then the equivalent resistance will be
R = 6 + 18 + 15 + 9
R = 48 ohms
Using ohms law
V = IR
Make current I the subject of formula
I = V/R
I = 90/48
I = 1.875A
And if the resistors are connected in parallel, the equivalent resistance will be
1/R = 1/6 + 1/18 + 1/15 + 1/9
1/R = 0.166 + 0.055 + 0.066 + 0.111
R = 1/0.3999
R = 2.5 ohms
Using ohms law
V = IR
I = 90/2.5
Current I = 35.99A
Answer:
it should be Work = F * d * cos(theta)
Explanation:
Force is mass * acceleration, and displacement is the distance between the starting and ending point.
we need theta because it can be used to calculate work when going up an incline surface. And we tend to use cosine because we are assuming that our motion is primarily in the X direction.
the strength and vitality required for sustained physical or mental activity.