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Author Question: The speed of a 4.0-kg object is given by v = (2t) m/s, where t is in s. At what rate is the ... (Read 86 times)

jace

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on: Jul 28, 2018
The speed of a 4.0-kg object is given by v = (2t) m/s, where t is in s. At what rate is the resultant force on this object doing work at t = 1 s?
 a. 48 W
  b. 40 W
  c. 32 W
  d. 56 W
  e. 16 W

Question 2

A 2.0-kg block slides down a plane (inclined at 40 with the horizontal) at a constant speed of 5.0 m/s. At what rate is the gravitational force on the block doing work?
 a. +98 W
  b. +63 W
  c. zero
  d. +75 W
  e. -75 W


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manuelcastillo

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

E

Answer to Question 2

B


jace

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  • Posts: 541
Reply 2 on: Jul 28, 2018
Great answer, keep it coming :)

xiazhe

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  • Posts: 331
Reply 3 on: Yesterday
:D TYSM

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