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Author Question: At the top of a cliff 100 m high, Raoul throws a rock upward with velocity 20.0 m/s. How much later ... (Read 129 times)

altibaby

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on: Jul 28, 2018
At the top of a cliff 100 m high, Raoul throws a rock upward with velocity 20.0 m/s. How much later should he drop a second rock from rest so both rocks arrive simultaneously at the bottom of the cliff?
 a. 5.05 s
  c. 2.48 s
  b. 3.76 s
  d. 1.78 s

Question 2

Human reaction time is usually about 0.20 s. If your lab partner holds a ruler between your finger and thumb and releases it without warning, how far can you expect the ruler to fall before you catch it? The nearest value is:
 a. 4.0 cm.
  c. 16 cm.
  b. 9.8 cm.
  d. 20 cm.


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allisonblackmore

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Reply #1 on: Jul 28, 2018
Answer to Question 1

C

Answer to Question 2

D


altibaby

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Reply 2 on: Jul 28, 2018
Excellent

duy1981999

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Reply 3 on: Yesterday
:D TYSM

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