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Kinetic Energy and Speed/Mass
Worksheet
Grade Level
Grade 8
8.53 Kinetic Energy and Speed/Mass
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A student writes, 'Since 12 is 3 times 4, a cart moving 12 m/s has 3 times the kinetic energy of the same cart moving 4 m/s.' Why is this wrong?
A
Because kinetic energy depends on speed squared, so the factor should be 9
B
Because kinetic energy depends only on mass
C
Because 12 m/s is not a possible speed
D
Because kinetic energy gets smaller at higher speed
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