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Author Question: A rock is thrown downward from an unknown height above the ground with an initial speed of 10 m/s. ... (Read 120 times)

formula1

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on: Jul 28, 2018
A rock is thrown downward from an unknown height above the ground with an initial speed of 10 m/s. It strikes the ground 3.0 s later. Determine the initial height of the rock above the ground.
 a. 44 m
  b. 14 m
  c. 74 m
  d. 30 m
  e. 60 m

Question 2

A toy rocket, launched from the ground, rises vertically with an acceleration of 20 m/s2 for 6.0 s until its motor stops. Disregarding any air resistance, what maximum height above the ground will the rocket achieve?
 a. 1.1 km
  b. 0.73 km
  c. 1.9 km
  d. 0.39 km
  e. 1.5 km


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Silverbeard98

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

C

Answer to Question 2

A


formula1

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Reply #2 on: Jul 28, 2018
TY


Silverbeard98

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Reply #3 on: Jul 28, 2018
You're welcome


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