Answer:
<u>The magnitude of the friction force is 8197.60 N</u>
Explanation:
Using the definition of the centripetal force we have:

Where:
- m is the mass of the car
- v is the speed
- R is the radius of the curvature
Now, the force acting in the motion is just the friction force, so we have:
<u>Therefore the magnitude of the friction force is 8197.60 N</u>
I hope it helps you!
P=w/t
w=15
t=3
therefore, 5 watts (b)
Ep=mgh
In your case it's Ep = 2*9,8*1=19,6 J
His error is turning off the fume hood. If his work station is right next to the fume hood then that means he is breathing in chemicals. He shouldn't of turned off the fume hood, he should move to another work space. And turn the fume hood back on.