a a pendulum is hanging from a point and its total mechanical energy is 10,000 j neglecting friction if energy is conserved what values should you put in the blanks?
pe= 10,000 j
ke=_______
pe= 5,000 j
ke=_______
pe= ______
ke= ______
pe= 5,000 j
ke= ______
pe=______
ke=______
1. by looking at the values above at which point in the pendulums motion do you think it is most difficult to stop
2. at which points would the pendulum be easiest to stop
3. if friction we're not present how much total mechanical energy would the pendulum have at:
a. point a
b. point b
c. point c
d. point d
e. point e
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Answer:
(Remember that the sum of potential and kinetic energy is always conserved.)
PE=10000 J
KE=0 J
PE=5000 J
KE=5000 J
PE=0 J
KE=10000 J
PE=5000 J
KE=5000 J
PE=10 000 J
KE=0 J
1.At the lowest point or Point C,because the pendulum has no potential energy and the kinetic energy is at its maximum.
2.At tbe highest points or Point A and E,because the potential energy is at its maximum and the pendulum has no kinetic energy.
3.All points have 10000 J mechanical energy.