Question

10 mark for review the kinetic energy, in joules, of an object with mass 5 kilograms moving at a speed of v meters per second is given by the function k, where k(v)=\frac{1}{2}v^{2}. which of the following is the best interpretation of k(44) = 4,840 in the context? (a) the object traveling at 44 meters per second has a kinetic energy of 4,840 joules. (b) the object traveling at 440 meters per second has a kinetic energy of 4,840 joules. (c) the object traveling at 4,840 meters per second has a kinetic energy of 44 joules. (d) the object traveling at 12,100 meters per second has a kinetic energy of 44 joules.

Explanation:

In the function $K(v)$, $v$ represents the velocity of the object in meters per second and $K(v)$ represents the kinetic - energy in joules. When we see $K(44)=4840$, it means that when the velocity $v = 44$ meters per second, the kinetic energy of the object is 4840 joules.

Answer:

A. The object traveling at 44 meters per second has a kinetic energy of 4,840 joules.