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Author Question: John throws a rock down with speed 11 m/s from the top of a 25-m tower. If g = 9.8 m/s2 and air ... (Read 83 times)

Bernana

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on: Jul 28, 2018
John throws a rock down with speed 11 m/s from the top of a 25-m tower. If g = 9.8 m/s2 and air resistance is negligible, what is the rock's speed just as it hits the ground?
 a. 19 m/s
  b. 25 m/s
  c. 610 m/s
  d. 22 m/s
  e. 12 m/s

Question 2

Gwen releases a rock at rest from the top of a 40-m tower. If g = 9.8 m/s2 and air resistance is negligible, what is the speed of the rock as it hits the ground?
 a. 28 m/s
  b. 14 m/s
  c. 20 m/s
  d. 40 m/s
  e. 780 m/s


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Jane

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

b

Answer to Question 2

a


Bernana

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Reply 2 on: Jul 28, 2018
Thanks for the timely response, appreciate it

diana chang

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Reply 3 on: Yesterday
Excellent

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