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A80-kg skater skates across a flat sheet of ice at a constant speed of 6.0 m/s. What is the kinetic energy of the skater?

A. 240 J
B. 480 J
C. 1,440 J
D. 2,880 J

User Gavy
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1 Answer

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Final answer:

The kinetic energy of an 80-kg skater moving at 6.0 m/s is calculated using the formula KE = ½ m v², resulting in 1,440 joules, which is option C.

Step-by-step explanation:

The kinetic energy of a skater can be calculated using the formula:



KE = ½ m v²

where m is the mass of the skater and v is the velocity. For an 80-kg skater skating at a constant speed of 6.0 m/s:



KE = ½ × 80 kg × (6.0 m/s)²



KE = ½ × 80 kg × 36 m²/s²



KE = ½ × 80 kg × 36 J/kg·m²/s²



KE = 1440 J

Therefore, the kinetic energy of the skater is 1,440 joules, which corresponds to answer choice C.

User EasilyBaffled
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