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Author Question: A rock falls from a vertical cliff that is 4.0 m tall and experiences no significant air resistance ... (Read 180 times)

lracut11

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on: Jul 29, 2018
A rock falls from a vertical cliff that is 4.0 m tall and experiences no significant air resistance as it falls. At what speed will its gravitational potential energy (relative to the base of the cliff) be equal to its kinetic energy?
 
  A) 3.1 m/s
  B) 4.4 m/s
  C) 6.3 m/s
  D) 8.9 m/s
  E) 13 m/s

Question 2

As more resistors are added in series to a constant voltage source, the power supplied by the source
 
  A) increases.
  B) decreases.
  C) does not change.
  D) increases for a time and then starts to decrease.


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bulacsom

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Reply #1 on: Jul 29, 2018
Answer to Question 1

C

Answer to Question 2

B


lracut11

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Reply 2 on: Jul 29, 2018
Wow, this really help

xiazhe

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Reply 3 on: Yesterday
:D TYSM

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