√42 is an irrational number, because you cannot express the answer as a fraction (ratio), and it certainly isn't a whole number or an integer.
Answer:
72 Joules.
Step-by-step explanation:
kinetic energy(K.E) is the energy possessed by a body in motion.
K.E = 1/2×mv²
where m is the mass and v is the velocity/speed of the body in motion.
K.E = 1/2×mv²
= 1/2 × 16 × 3²
= 1/2 × 16 × 9
= 72 Joules.
