When she descends the potential energy will decrease at the same rate that the kinetic energy increases.
<h3>
</h3><h3>
How to describe changes in energy?</h3>
We know that we can write the total energy of a moving object as:
E = U + K
Where U is the potential energy and K is the kinetic energy.
In the given case, U will only depend on the height of the girl and it will be maximized when the height is maximum.
K = (1/2)*m*v^2
where m is the mass and v is the velocity.
When the girl is at the highest point, the velocity becomes equal to zero. This happens because at that point she stops going up and starts going down, so the velocity must be zero at that moment.
Then we have K = 0.
E = U.
As she starts going down, the velocity starts increasing and the height decreases, thus, the kinetic energy increases and the potential energy decreases. This relates to the conservation of energy. E will always be the same value, but K and U will depend on the position of the girl.
This means that if the potential energy decreases a quantity e', then the kinetic energy must be increased by that same amount.
If you want to learn more about energy, you can read:
brainly.com/question/166559
Answer: d) the median speed in race a is about 153 miles per hour, and the median speed in race b is about 145 miles per hour.
Explanation:
The whole question is written below:
The box plots show the average speeds, in miles per hour, for the race cars in two different races (figure attached)
. Which statement compares the median speeds for the data in the two box plots?
a) the median speed in race a is about 142 miles per hour, and the median speed in race b is about 140 miles per hour.
b) the median speed in race a is about 120 miles per hour, and the median speed in race b is about 125 miles per hour.
c) the median speed in both races is about 165 miles per hour.
d) the median speed in race a is about 153 miles per hour, and the median speed in race b is about 145 miles per hour.
Firstly, let's explain how to read a box plot (as the shown in the second figure):
- The outer extreme points are the minimum and maximum values, respectively.
- The inner extreme points are the first quartile (also called lower median) and the third quartile (also called upper median).
- The point in the middle is Median.
So, according to this, the median for race a (top plot) is between 150 and 155, and the median for race b (bottom plot) is 145.
Hence, among the given options the correct is:
<h2>
d) the median speed in race a is about 153 miles per hour, and the median speed in race b is about 145 miles per hour.</h2>
Answer:A
Explanation:One listener interrupts the speaker by inserting an opinion.
Answer:
Attend all your classes. It may seem like a no-brainer, but the best way to study without studying is simply by attending all your classes. Sure, you may scoff and wonder how just being present will help with your studying but here's the key — you have to be present both physically and mentally in class