What is the kinetic energy in joules?

An object of mass 6kg has a speed of 4m/s and moves a distance of 2m.

2 Answers
Feb 17, 2018

Answer:

See below

Explanation:

#K.E= 1/2 * m * v^2#

#m# is the mass
#v# is the velocity

#m# = 6
#v# = 4

#therefore K.E = 1/2 * 6 * 4^2 = 48 J#

#therefore 48# joules

Feb 18, 2018

Answer:

#48 \ "J"#

Explanation:

Well, kinetic energy is independent of distance. The equation for kinetic energy is

#KE=1/2mv^2#

#m# is the mass of the object in #"kg"#

#v# is the velocity in #"m/s"#

We have: #m=6 \ "kg"#, #v=4 \ "m/s"#

#:.KE=1/2*6 \ "kg"*(4 \ "m/s")^2#

#=1/2*6 \ "kg"*16 \ "m"^2"/s"^2#

#=48 \ "kg" \ "m"^2"/s"^2#

#=48 \ "J"#