A 500-kg elevator is pulled upward by a cable that exerts a ...

[ETearle]

A 500-kg elevator is pulled upward by a cable that exerts a constant force of 5500 N on the elevator for a distance of 50.0 m. The elevator is the system.
 
  (a) What is the work done by the 5500-N force? (b) What is the work done by the gravitational force? (c) What is the net work done on the elevator?

Question 2

If the Sun were twice as massive
 
  A) its pull on the Earth would double.
  B) Earth's pull on the Sun would double.
  C) both of these
  D) none of the above

[mcni194]

Answer to Question 1

(a) 275 Kj (b) -245 kJ (c) 30.0 kJ

Answer to Question 2

Answer: C

[ETearle]

Thanks

[mcni194]

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