If the energy of the system is constant, and all forces are conservative, which statement is true:
a. |
KEi + PEi = KEf +PEf |
|
b. |
KEi + KEf = PEi + PEf |
|
c. |
ΔKE = ΔPE |
|
d. |
PEi |
If only conservative forces are involved in the system and
internal energy of system is constant than sum of total initial
energy is equal to sum of total final energy.
If the energy of the system is constant, and all forces are conservative, which statement is...
Which statement is always true: The total energy of a closed system... A) is always equally divided between kinetic energy and potential energy B) remains constant, assuming only conservative forces act on the system C) is either all kinetic energy or all potential energy at any one instant D) must be constantly changing
Select all of the following statements that are true about potential energy and conservative forces. Potential energy is the energy associated with the configuration of a system. It is only possible to have potential energy if there are 2 or more objects in the system that interact with each other through internal, conservative forces. Absolute values of potential energy have no meaning: only changes in the potential energy are physically meaningful. There is only one kind of potential energy: gravitational...
True or false? 75. The forces in an isolated system must be conservative 76. The total mechanical energy of a system is not affected by friction forces. 77. An external force can change the total energy of a system that is not isolated. 87. The center of mass of an isolated system moves at a constant velocity as long as constant force is applied, Thank you!
3.1 Determine which of the following forces are conservative by find- ing the curl: (a) F ix + jy (b) F - iy + jx (C) F - iy - jz (d) F - iry + jyz + kzz (e) F-iyz + jar + kry 3.2 Find the value of the constant c such that the following forces are conservative: (a) F = ixy + jer (b) F = i + jcm+
Give examples of : (a) two conservative forces, and (b) as many (but at least 3) non-conservative forces as you can think of. For each example of the conservative force, give the expression for the potential energy associated with the conservative force. For each example of a non-conservative force, give a situation where non-conservative force changes the total mechanical energy of a system.
under what conditions is mechanical energy conserved? only when conservative forces are present Only when the net talk on a system is zero only when the net force on the system is zero mechanical Everly is always conserved
Learning Goal: To practice Problem-SolvingStrategy 7.2 Conservation of energy with conservative forces.A basket of negligible weight hangs from a vertical spring scale offorce constant1500 . If you suddenly put an adobebrick of mass3.00 in the basket, find the maximum distance thatthespring will stretch.Problem-Solving Strategy 7.2 Conservation of energy with conservativeforcesSET UPIdentify the system youwill analyze, and decide on the initial and final states (positionsand velocities) you will use in solving the problem. Draw oneormore sketches showing the initial and finalstates.Define...
Conservative Forces and Potential Energy? A simple Atwood's machine uses two masses, m1 and m2. Starting from rest, the speed of the two masses is 6 m/s at the end of 5 s. At that instant, the kinetic energy of the system is 67 J and each mass has moved a distance of 15 m. Determine the values of m1 and m2
QUESTIONS At constant pressure and temperature, which statement is true? A. All reactions for which AH<0 are spontaneous B. All reactions for which ASKO are spontaneous. C. All reactions for which AG<0 are spontaneous. D. All reactions for which K> 1 are spontaneous.
3. A particle subject only to conservative forces has the potential energy vs. position curve shown to the right. The function for the potential is: U(x)-k where γ 1.00 J.m2 and k-7.00 Jr. The particle has a mass of 3.00 kg. (a) Calculate the force on the particle as a function of position, F(x). (b) At which points, (A, B, C, D), must the particle be placed at rest such that it will stay at rest? Why must the particle...