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Author Question: A boat with mass 950 kg is heading into the harbor at a speed of 10.0 m/s. How much work is required ... (Read 140 times)

karlynnae

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on: Jul 28, 2018
A boat with mass 950 kg is heading into the harbor at a speed of 10.0 m/s. How much work is required to slow the boat to 1.0 m/s?
 a. 4.8E+4 J
  b. 9.4E+4 J
  c. 4.7E+4 J
  d. 2.3E+4 J

Question 2

A 6.1-g bullet has a velocity of 475 m/s when it penetrates a wooden door to a depth of 3.5 cm. Assuming the frictional force that stops the bullet is constant, how long does it take from the time the bullet hits the door till it comes to a stop?
 a. 1.5E4 s
  b. 7.4E5 s
  c. 4.5E2 s
  d. 3.7E3 s


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stillxalice

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

d

Answer to Question 2

a


karlynnae

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Reply #2 on: Jul 28, 2018
Thank you!


stillxalice

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Reply #3 on: Jul 28, 2018
Always glad to help...


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