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Author Question: A rock is thrown from the roof of a building, with an initial velocity of 10 m/s at an angle of 30 ... (Read 248 times)

vHAUNG6011

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on: Jul 29, 2018
A rock is thrown from the roof of a building, with an initial velocity of 10 m/s at an angle of 30 above the horizontal. The rock is observed to strike the ground 43 m from the base of the building.
 
  What is the height of the building assuming no air resistance?

Question 2

A projectile is shot straight up from the surface of Earth by means of a very powerful cannon and experiences no appreciable air resistance.
 
  If the projectile reaches a height of 35,000 m above Earth's surface, what was the speed of the projectile when it left the cannon? (G = 6.67  10-11 N  m2/kg2, the radius of Earth is 6.38  106 m, and Mearth = 5.97  1024 kg) A) 355 m/s
  B) 505 m/s
  C) 827 m/s
  D) 710 m/s
  E) 906 m/s


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leeeep

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

96 m

Answer to Question 2

C


vHAUNG6011

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Reply 2 on: Jul 29, 2018
Excellent

mohan

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Reply 3 on: Yesterday
Wow, this really help

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