Question

KE 1/2mv^2 is a for kinetic energy (KE) in terms of mass, m, and the velocity, v, of a moving object. Which choice shows a correct way to express the mass in terms of the kinetic energy and velocity?

A. m=2KE/v^2, where v≠0
B. m=KE/2v^2, where v≠0
C. m √2KE/v, where v≠0
D. m= √KE/2v, where v≠0

Answer 1

Answer:Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v2. If the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

Answer 2

energy = (1/2)*m*(v^2)