A 60. kg person walks along a 100. kg log at the rate of 0.8 m/s ...

[penguins]

A 60. kg person walks along a 100. kg log at the rate of 0.8 m/s (with respect to the log). With what speed does the log move, with respect to the shore?
 
  What will be an ideal response?

Question 2

When the Sun becomes a red giant
 
  A) some life on Earth may still be able to survive on the surface
  B) life will probably not be able to survive even beneath the surface
  C) life may still be able to survive in the atmosphere
  D) the Earth will be destroyed

[cam1229]

Answer to Question 1

0.3 m/s

Answer to Question 2

B

[penguins]

Excellent

[fatboyy09]

Gracias!