If the scalar (dot) product of two vectors is negative, it means ...

[Yolanda]

If the scalar (dot) product of two vectors is negative, it means that
 a. there was a calculator error.
  b. the angle between the vectors is less than 90 degrees.
  c. the angle between the vectors is 90 degrees.
  d. the angle between the vectors is greater than 270 degrees.
  e. the angle between the vectors is between 90 and 180 degrees.

Question 2

In a contest, two tractors pull two identical blocks of stone the same distance over identical surfaces. However, block A is moving twice as fast as block B when it crosses the finish line. Which statement is correct?
 a. Block A has twice as much kinetic energy as block B.
  b. Block B has lost twice as much kinetic energy to friction as block A.
  c. Block B has lost twice as much kinetic energy as block A.
  d. Both blocks have had equal losses of energy to friction.
  e. No energy is lost to friction because the ground has no displacement.

[princessflame2016]

Answer to Question 1

e

Answer to Question 2

d