Question

A duck with a mass of 0.90 kilograms flies at a rate of 12.0 m/s. What is the kinetic energy of the duck? 130 J 5.4 J 65 J 11 J

Answer 1

The answer is j 5.4 the second one

Answer 2

Answer: 65 J

Explanation:

Kinetic energy is the energy possessed by an object by virtue of its motion.

$K.E.=\frac{1}{2}m\times v^2$

K.E= Kinetic energy = ?

m= mass of duck = 0.90 kg

v= velocity of duck= $12ms^{-1}$

Putting in the values we get

$K.E=\frac{1}{2}\times 0.90kg\times (12ms^{-1})^2$

$K.E=65kgm^2s^{-2}=65Joules$    

$(1kgm^2s^{-2}=1Joule)$

Thus kinetic energy of the duck is 65 Joules.