Assuming muscles are 20 efficient, at what rate is a 60. kg boy ...

[danielfitts88]

Assuming muscles are 20 efficient, at what rate is a 60. kg boy using energy when he runs up a flight of stairs 10. m high, in 8.0 s?
 
  What will be an ideal response?

Question 2

Consider an Earth satellite in an elliptical orbit. Its centripetal acceleration is
 
  A) zero.
  B) > g at the satellite.
  C) < g at the satellite.
  D) constant.
  E) g at the satellite.

[aprice35067]

Answer to Question 1

147 kW

Answer to Question 2

E