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Author Question: How much work is done by a person lifting a 2.0-kg object from the bottom of a well at a constant ... (Read 68 times)

Yolanda

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  • Posts: 757
on: Jul 28, 2018
How much work is done by a person lifting a 2.0-kg object from the bottom of a well at a constant speed of 2.0 m/s for 5.0 s?
 a. 0.22 kJ
  b. 0.20 kJ
  c. 0.24 kJ
  d. 0.27 kJ
  e. 0.31 kJ

Question 2

A 2.0-kg projectile moves from its initial position to a point that is displaced 20 m horizontally and 15 m above its initial position. How much work is done by the gravitational force on the projectile?
 a. +0.29 kJ
  b. -0.29 kJ
  c. +30 J
  d. -30 J
  e. -50 J


stano32

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

B

Answer to Question 2

B


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