using mechanical energy conservation,
KEi + PEi = KEf + PEf
4 J + 6 J = 8 J + PEf
PEf = 2 J. Answer
For a conservative system, at some point the kinetic energy is 4 J and the potential...
0 For a conservative system, at some point the kinetic energy is 4 J and the potential energy is 6 J. At another point if the kinetic energy becomes 8 J then potential energy would be (in Joule): ion Answer:
A.) An isolated system has its kinetic energy decrease by 10 J while its potential energy increases by 5 J. What is the change in the system's internal energy (in J)? B.) A 2-kg ball is dropped from a height of 2 m. What is the change in the kinetic energy of the ball (in J) as it travels through this distance to the floor?
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
4. An electron passes a point at which the poten- tial is 5V, with a kinetic energy of 7eV. Some time later it passes a point where the potential is 8 V. What is its kinetic energy there, in eV and in J?
is into 5. A moving particle is subject to conservative forces only. When its kinetic energy decreases by 10 J, what happens to its total mechanical energy? What happens to its potential energy?
A system loses 860 J of potential energy. In the process, it does 510 J of work on the environment and the thermal energy increases by 100 J. Find the change in kinetic energy ΔK.
A system loses 690 J of potential energy. In the process, it does 700 J of work on the environment and the thermal energy increases by 140 J . Find the change in kinetic energy ΔK.
The figure is a graph of the gravitational potential energy and kinetic energy of a 70 g yo-yo as it moves up and down on its string. The acceleration of gravity is 9.81 m/s2 . a) By what amount does the mechanical energy of the yo-yo change after 6.0 s? Answer in units of J. b) What is the speed of the yo-yo after 4.5 s? Answer in units of m/s. c) What is the maximum height of the yo-yo?...
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...
please help with both! thank you :) Review A system loses 640 J of potential energy. In the process, it does 720 J of work on the environment and the thermal energy increases by 180 J Part A Find the change in kinetic energy AK. Express your answer to two significant figures and include the appropriate units. HA Value ΔΚ Units Request Answer Submit Provide Feedback Next> <CH10HW Problem 10.38 4 of 8 Review Consider the process shown in (Figure...