Which quantity has the SI unit Newton?

Which quantity has the SI unit Newton?

• A. Joule (J)
• B. Newton (N)
• C. Pascal (Pa)
• D. Watt (W)

Answer: (B)

The Newton is the unit used to measure force. It is defined by F = ma, so one Newton is the force required to accelerate a mass of one kilogram at one meter per second squared, giving units of kg·m/s^2. This shows why Newton is the unit for force, not for energy, pressure, or power. For context, energy uses the Joule (one Joule equals one Newton-meter), pressure uses the Pascal (one Pascal equals one Newton per square meter), and power uses the Watt (one Watt equals one Joule per second).

The Newton is the unit used to measure force. It is defined by F = ma, so one Newton is the force required to accelerate a mass of one kilogram at one meter per second squared, giving units of kg·m/s^2. This shows why Newton is the unit for force, not for energy, pressure, or power. For context, energy uses the Joule (one Joule equals one Newton-meter), pressure uses the Pascal (one Pascal equals one Newton per square meter), and power uses the Watt (one Watt equals one Joule per second).