Petra pushes a crate across a rough floor. A frictional force of ...

[jake]

Petra pushes a crate across a rough floor. A frictional force of 28.0 N acts to oppose the motion of the crate, and Petra pushes with a horizontal force of 36.4 N. If the net work Petra does is 94.5 J, through what distance did she push the crate?
 a. 11.3 m
  b. 3.38 m
  c. 2.60 m
  d. 2 650 m
  e. 3 440 m

Question 2

A satellite is held in orbit by a 1 000-N gravitational force. Each time the satellite completes an orbit of circumference 80 000 km, the work done on it by gravity is:
 a. 1.0108 J.
  b. 8.0108 J.
  c. 1.01011 J.
  d. 0.
  e. 8.01011 J.

[akudia]

Answer to Question 1

a

Answer to Question 2

d

[jake]

Gracias!

[mcarey591]

TYSM