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Author Question: A 55-kg box rests on a horizontal surface. The coefficient of static friction between the box and ... (Read 117 times)

sarasara

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  • Posts: 521
on: Jul 29, 2018
A 55-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.30. A horizontal 140-N force is exerted on the box. What is the friction force exerted by the surface on the box?
 
  A) 140 N
  B) 160 N
  C) 16.5 N
  D) 0.00 N
  E) 42 N

Question 2

The energy transformation that occurs during downhill skiing is
 
  A) kin E  grav E.
  B) chem E  kin E + therm E.
  C) kin E  grav E + therm E.
  D) grav E  chem E.
  E) grav E  kin E + therm E.


mk6555

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Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

E


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