Answer:
b
Explanation:
the law says that energy can not be created or destroy but can be transform from one energy to another.
Answer:
The system has two solutions:
(1, -1) and (0, 0)
Explanation:
We have the system of equations:
x + y = 0
x = x^2 + 2*x*y
To solve this, the first step is to isolate one of the variables in one of the equations, I will isolate x on the first one.
x = -y
Now we can replace this on the other equation, to get:
x = x^2 + 2*x*y
(-y) = (-y)^2 + 2*(-y)*y
Now we can solve this equation for y.
-y = y^2 - 2*y^2
-y = -y^2
y^2 - y = 0
We can solve this using the Bhaskara's formula:
The solutions are then:
Then the two possible solutions are:
y = (1 + 1)/2 = 1
and
y = (1 - 1)/2 = 0
Suppose that we take the first one, y = 1.
Then the solution for x is given by "x = -y"
Then:
x = -1
This means that one solution of the system is (-1, 1)
If we take the other solution for y, y = 0
The value of x will be:
x = -y = -0 = 0
Then another solution of the system is (0, 0)
To solve this problem we will apply the linear motion kinematic equations. With the information provided we will calculate the time it takes for the object to fall. From that time, considering that the ascent rate is constant, we will take the reference distance and calculate the distance traveled while the object hit the ground, that is,
Then the total distance traveled would be
Therefore the railing will be at a height of 77.7m when it has touched the ground
Answer:
19m/s
Hope this answer is right!!
Explanation:
The initial and final velocity is given and the average velocity is asked, which can be calculated by the following method,
Given that initial velocity = 10 m/s and final velocity = 28 m/s
Average velocity = final velocity+initial velocity/2
Although, average Velocity=total displacement/total time
But here, there is only given initial and final velocity therefore it will be simply an average of the two.
Therefore, the average velocity of the object is 19 m/s.
By someone wearing them doing some exhilarating thing