Which physical quantity can be measured in joules per metre?
A. kinetic energy
B. momentum
C. power
D. work
E. force
Knowing that joules in SI units is expressed by:
J =m\cdot N = m\frac{kgm}{s^2} = \frac{kgm^2}{s^2}
Joules per metre: \frac{J}{m} = N = \frac{kgm}{s^2}
The measurements for the following are:
a) kinetic energy: mV^2
b) momentum: \frac{kgm}{s}
c) power: W
d) work: J
e) force: N = \frac{kgm}{s^2}
So we can easily say that the only physical quantity that can be measured in joules per metre is (E) force.
7 Likes