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The amount of time that passes from when this skateboarder begins to slow down until she begins to move back down the incline is 8.75 seconds.
<u>Given the following data:</u>
- Speed = 1.75 m/s
- Acceleration = -0.2
To calculate the amount of time that passes from when this skateboarder begins to slow down until she begins to move back down the incline, we would apply the first equation of motion;
<h3>The formula for the first equation of motion.</h3>Mathematically, the first equation of motion for a decelerating object is given by this formula;
<u>Where:</u>
- a is the acceleration.
- V is the final speed.
- U is the initial speed.
- t is the time measured in seconds.
Substituting the given parameters into the formula, we have;
Time, t = 8.75 seconds.
Read more on acceleration here: brainly.com/question/24728358
PART A)
Equivalent resistance in parallel is given as
now we have
PART B)
since potential difference across all resistance will remain same as all are in parallel
so here we can use ohm's law
As we know i = 7 A current flows through 15 ohm resistance
PART C)
Similarly ohm's law for 20 ohm resistance we can say