Question

A particle of mass 6 kg moves with a speed of 7 m/s, its kinetic energy is:

Answer 1

Kinetic Energy is 147 J

Step-by-step explanation:

`{ \rm{kinetic \: energy = (1)/(2) * mass * velocity {}^(2) }} \\ \\ { \rm{k.e = (1)/(2) * 6 * {7}^(2) }} \\ \\ { \rm{k.e = 3 * 49}} \\ \\ { \boxed{ \rm{k.e = 147 \: joules}}}`

Answer 2

Hi there!

Recall the equation for kinetic energy:

`\large\boxed{KE = (1)/(2)mv^2}}`

KE = Kinetic energy (J)

m = mass (kg)

v = velocity (m/s)

Plug in the given values:

`KE = (1)/(2)(6)(7^2) = \boxed{147 J}`