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Author Question: An amount of work equal to 2.0 J is required to compress the spring in a spring-gun. What is the ... (Read 50 times)

pane00

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on: Jul 28, 2018
An amount of work equal to 2.0 J is required to compress the spring in a spring-gun. What is the launch speed of a 26.0-g marble?
 a. 12.4 m/s
  b. 13.4 m/s
  c. 8.8 m/s
  d. 3.92 m/s
  e. 0.392 m/s

Question 2

A 2.50-kg projectile is launched at an angle of 20.0 above the horizontal with an initial speed of 100 m/s from the top of a building 40 m high. If the projectile is traveling 85.0 m/s at its maximum height of 47.0 m, how much work has been done on the projectile by air friction?
 a. 3.3E+3 J
  b. 1.7E+2 J
  c. 3.5E+3 J
  d. 2.4E+4 J


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dmurph1496

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

a

Answer to Question 2

a


pane00

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Reply 2 on: Jul 28, 2018
Gracias!

amandalm

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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