A person drives 4 miles to the mall. If the speed limit is 45 miles/hr and the person
1 answer:
Answer: Third Option
Yes, the person is going 133 miles/hr.
Explanation:
Remember that the average speed can be calculated as
Where s is the speed
d is the distance traveled
t is the time
In this case
Therefore
Remember that the speed limit is 45 miles/hr
So the answer is the third option "Yes, the person is going 133 miles/hr".
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Answer:
<em>The force of kinetic friction between Kiera and the floor is 9.24 N</em>
Explanation:
<u>Friction Force</u>
When an object is moving and encounters friction in rough surfaces, it loses acceleration and/or velocity because the friction force opposes motion.
The friction force when an object is moving on a horizontal surface is calculated by:
Where μ is the coefficient of static or kinetics friction and N is the normal force.
If no forces other then the weight and the normal are acting upon the y-direction, then the weight and the normal are equal in magnitude:
N = W
Thus, the friction force is:
Kiera, the W=330 N girl steps in water that has a coefficient of friction of μ=0.028 with the floor.
The kinetic friction force is:
Fr = 0.028*330
Fr = 9.24 N
The force of kinetic friction between Kiera and the floor is 9.24 N