During the swing of a frictionless pendulum, what energy form(s) remain constant?

Question

A.kinetic energy only
B.potential energy only
C.both kinetic energy and potential energy
D.kinetic plus potential energy
E. None of these forms remains constant.

Answer 1

remain constant?

G force. 9.81 m/sec^2

Answer 2

During the swing of a pendulum the sum of the kinetic and potential energy, i.e the total energy remains constant. This is the law of conservation of energy

Answer 3

D, kinetic plus potential energy. At the top of the swing, motion stops and there is zero kinetic energy but maximum potential energy. At the bottom of the swing there is maximum velocity (kinetic energy) but zero potential energy. At every other position the potential energy of height and the kinetic energy of motion are being converted one direction or the other without loss off energy and their sum must remain constant.

Answer 4

the answer is actually E. the reason is this. If a pendulum swings without friction it is experiencing a physics phenomena known as simple harmonic motion(SHM) during shm, the pendulum swings continuosly without stopping from left to right as there is no air friction.
when the pendulum is at the extreme positions of left and right u notice that the speed there is the slowest because it is about ti change direction jus like when u throw a ball into the air and then it starts to fall at the max pt. Since KE=1/2MV^2, at the extremes of left and right, KE is zero. By conservation of energy, KE loss=PE gain, therefore 0 KE=max PE
however when the pendulum is in the middle of oscillation at about the centre plane. (I.E: the centre point of oscillation) its velocity is the greatest, when V is greatest, so is KE. thus by COE, when KE is maximum, PE is minimum. hence KE and PE are constantly changing and are not constant throughout.
If u wanna be sure try, it yourself in the lab. you'll notice the pendulum moves slowest at extreme positions and fastest in the middle. Therefore when u play a shooting game when the target moves left and right, the best time to shoot the target will be at its extreme positions as it moves slowest there(FYI)

damn that was long, hope it helped u understand better anyway!! :)

Answer 5

During the pendulum swing, both kinetic and potential energy change constantly [as kinetic decreases, potential increases and vice cersa]. the correct answer is E. the only energy form that is constant is the pendlum's momentum.

Answer 6

the sum of kinetic and potential energy .


mechanical energy that is
the potential transform gradually to kinetic and the kinetic to potential
whne it reaches at stop---> max/ potential energy
when it passes at the lower poitn bottom of orbital----->max/ kinetic energy


the sum remains the same ..-->> correct answer is D.

Answer 7

energy is transformed into force & counterforce . The reasen the force doesn't remain constant is due to the pull of gravity & energy lost to convershon.

Answer 8

The answer is C,

Answer 9

gravity?