Table 1.1 shows SI base quantities and their corresponding base unit.
SI base quantity | SI base unit |
Mass | kilogram, kg |
Time | |
Length |
Newton's second law of motion describes the relationship between force F mass m and acceleration a:
The derived unit for force is the newton (N).
Use Newton's second law to write 1 N in SI units.
The kinetic energy equation describes the relationship between energy E, mass, m, and velocity, v.
The derived unit for energy is the joule (J).
Use the equation linking kinetic energy and speed to write 1 J in SI base units.
The derived unit for power P is the watt W.
Given that power is the energy transferred E per unit time t, deduce the SI base units for power
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