The pendulum has a kinetic energy of 330 J at the bottom of its swing.
when a pendulum oscillates, the energy at its highest point is wholly potential, since it is momentarily at rest at the highest point. The pendulum experiences acceleration which is directed towards the mean position, as a result of which its speed increases. It has maximum speed at the point which is at the bottom of its swing.
As the pendulum swings from the highest to the lowest point, the potential energy at the highest point is converted into kinetic energy.
If air resistance can be neglected, one can apply the law of conservation of energy, which states that the total energy of a system remains constant.
In this case, the potential energy of 330 J at the highest point would be equal to the kinetic energy at the bottom point.
Therefore, the kinetic energy at the bottom of its swing will be 330 J.
Answer:
Applied pressure is 1.08 10⁵ Pa
Explanation:
This exercise is a direct application of Boyle's law, which is the application of the state equation for the case of constant temperature.
PV = nR T
If T is constant, we write the expression for any two points
Po Vo = p1V1
From the statement the initial pressure is the atmospheric pressure 1.01 10⁵ Pa, so we clear and calculate
1 Pa = 1 N / m2
P1 = Po Vo / V1
P1 = 1.01 10⁵ 20/18.7
P1 = 1.08 10⁵ Pa
The cell would die if it stopped using energy
Answer:
If a negatively charged balloon is brought near one end of the rod but not in direct contact, then <u>the negative charges on the balloon repel the same amount of negative charges on the end of the rod that is close to the balloon</u>, and the positive charges stay at the balloon-side of the rod. The total charge of the rod is still zero, but the distribution of the charges are now non-uniform.
A) Most is transformed into thermal energy. I took the test.
