Refer to the diagram shown below.
h = height of the girl above water when she lets go of the rope.
The launch velocity is 22.5 m/s at 35° to the horizontal. Therefore the vertical component of the velocity is
v = 22.5 sin(35°) = 12.9055 m/s.
The time of flight is t = 1.10 s before the girl hits the surface of the water at a height of -h.
Therefore
-h = (12.9055 m/s)*(1.10 s) - (1/2)*(9.8 m/s²)*(1.10 s)²
-h = 8.267 m
= 8.3 m (nearest tenth)
Answer:
When the girl let go of the rope, she was about 8.3 m above the surface of the water.
Explanation:
Earth or any planet are actually born from huge clouds of gas and dust. Their stellar mass are fairly distributed at a radius from the axis of rotation. Gravitational force cause the cloud to come together. Now the whole gathered in smaller area. Now, individual particles come close to the roational axis. Thus, decreasing the moment of inertia of the planet.
As
I=mr^2
reducing r reduces I. However, the angular moment of the system remains always conserved. So, to conserve the angular momentum the angular velocity of the planet increases and so did the otational kinetic energy
They have the most potential energy when they reach the tops of the pendulum, just like it has the most kinetic energy when the pendulum swings through the bottom.
Answer:
conductivity is when an object can pass electricity flow through itself
Explanation:
ex: metal
Answer:
Explanation:
The work done by the electrostatic force is
where F can be calculated by Coulomb's Law:
We can express this equation by the variables given in the question.
Electric field is denoted as E.
The distance, x, is given as L. If B is greater than A, the work done is positive. Else, work is negative.