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Home Q & A Board Science-Related Homework Help Physics Astronomy
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dfysb54w dfysb54w
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6 years ago
A 35 N-force toward the west is applied to an object. The object moves 20 m east during the time the force is applied. What is the change in kinetic energy of the object?
 
  A) 0.0 J
  B) 0.57 J
  C) 1.0 J
  D) -700 J
  E) 350 J

Question 2

The formula mg = kx describes a spring that is stretched by hanging an object on it. The constant k is called the spring constant. What are its units?
 
  A) m s2/kg
  B) kg/s2
  C) kg s2
  D) s/m kg
  E) N m

Question 3

Daisy throws a rock horizontally with a speed of 12.0 m/s from a bridge. It falls 2.28 s before reaching the water below.
 
  (a) When the rock hits the water it is traveling with what horizontal component of velocity?
  (b) What was the total speed just before hitting the water?
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magn0117magn0117
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6 years ago
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dfysb54w Author
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#2
6 years ago
Thank you for being such a great website leader! All of your answers were right.
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