Question

in einstein's famous equation e=mc^2, describing the relationship between matter and energy, the units for E are

m=====>kg, c=====>m/s

a) kg m/s
b)kg m/s^2
c) m^2/s^2
d)kg m^2/s^2

I think its either B or D but indecisive...

Answer 1

kg * m/s * m/s

= kg m^2/s^2

By the way force = mass * acceleration
which is
kg m/s^2 in Newtons

force * distance = work which is energy in Joules
so
energy = kg m/s^2 * m = kg m^2/s^2