In a Contest, Two Tractors Pull Two Identical Blocks of Stone

question 5

Multiple Choice

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.

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