Question

A6 kg object has 270J of kinetic energy. How fast is it moving? Ek =

(V)mv2 (rearrange equation)
90 m/s
31 m/s
91 m/s
89 m/s

Answer 1

9.5m/s

Step-by-step explanation:

Given parameters

Mass of object = 6kg

Kinetic energy = 270J

Unknown:

Velocity = ?

Solution:

The kinetic energy of a body is the energy due to the motion of that body.

It is expressed as;

k.e =
`(1)/(2)` m v²

m is the mass

v is the velocity

So;

270 =
`(1)/(2)` x 6 x v²

270 = 3v²

v² = 90

v = 9.5m/s