Answer:
The answer is 1760 J
Explanation:
Given:
m = 55 kg
v = 8 m/s
Unknown:
KE or kinetic energy of the rock
Formula and solution:
KE = 1/2 mv²
KE = 1/2 (55kg) (8 m/s)²
1/2 of 55kg = 55 ÷ 2 = 27.5kg
8² or 8×8 = 64 m²/s²
KE = (27.5kg) (64 m²/s²)
Final Answer:
KE = 1 760kg.m²/s² or simplify as 1760 J
