## calculating kinetic energy

$E=hv$

Vikramjeet Gill 1C
Posts: 30
Joined: Fri Sep 28, 2018 12:15 am

### calculating kinetic energy

For the equation Ek=1/2(M)(V^2)
M stands for the mass of the electron, is the unit for that mass suppose to be in grams or kilograms for this equation?

marisaimbroane1J
Posts: 69
Joined: Fri Sep 28, 2018 12:23 am

### Re: calculating kinetic energy

The standard units are kg, so I think your mass should be in kg. The mass of an electron is 9.11x10^-31 kg; so I think that is the number that should be used in the equation.

ariellasarkissian_3H
Posts: 46
Joined: Fri Sep 28, 2018 12:25 am

### Re: calculating kinetic energy

Mass will be in kg, because that is the standard SI unit!

michelle
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

### Re: calculating kinetic energy

That should be kg. We use SI units in all equations.

Vy Lu 2B
Posts: 59
Joined: Fri Sep 28, 2018 12:24 am

### Re: calculating kinetic energy

The unit is supposed to be in kg, as that is the standard SI unit.