Answer:
option c
Explanation:
K.E=1/2mv(squared)
K.E=1/2x900x80x80
K.E=450x6400=2880000J
convert to KJ=2880000/1000=2880KJ
The object with the most kinetic energy ( 222,221.8J ) from its motion is the 900kg car traveling at 80 km/h.
Option C) is the correct answer.
Kinetic energy is simply a form of energy a particle or object possesses due to its motion.
It is expressed as;
K = (1/2)mv²
Where m is mass of the object and v is its velocity.
For object A car
Mass m = 1100kg, Velocity v = 60km/h = 16.6667m/s
K = (1/2) × m × v²
K = (1/2) × 1100kg × (16.6667m/s)²
K = 0.5 × 1100kg × 277.778m²/s²
K of A = 152,779.4J
For object B motorcycle
Mass m = 300kg, Velocity v = 100km/h = 27.7778m/s
K = (1/2) × m × v²
K = (1/2) × 300kg × (27.7778m/s)²
K = 0.5 × 300kg × 771.606m²/s²
K of B = 115,740.9J
For object C car
Mass m = 900kg, Velocity v = 80km/h = 22.2222m/s
K = (1/2) × m × v²
K = (1/2) × 900kg × (22.2222m/s)²
K = 0.5 × 900kg × 493.826m²/s²
K of C= 222,221.8J
For object D truck
Mass m = 2000kg, Velocity v = 50km/h = 13.8889m/s
K = (1/2) × m × v²
K = (1/2) × 2000kg × (13.8889m/s)²
K = 0.5 × 2000kg × 192.9015m²/s²
K of D = 192,901.5J
Therefore, the object with the most kinetic energy ( 222,221.8J ) from its motion is the 900kg car traveling at 80 km/h.
Option C) is the correct answer.
Learn more about kinetic energy here: brainly.com/question/12669551
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