What is the SI unit of force?

What is the SI unit of force?

• A. Pascals
• B. Joules
• C. Newtons
• D. Watts

Answer: (C)

In physics, the SI unit of force is the newton. By Newton’s second law, force equals mass times acceleration (F = m a). Using SI units, mass is kilograms and acceleration is meters per second squared, so the unit for force is kg·m/s^2. A newton is defined as the force required to accelerate a 1 kilogram mass at 1 meter per second squared, so 1 N = 1 kg·m/s^2. The unit is named for Isaac Newton. The other units correspond to different quantities: pascal is for pressure (force per area), joule is for energy or work, and watt is for power, so they do not measure force.

In physics, the SI unit of force is the newton. By Newton’s second law, force equals mass times acceleration (F = m a). Using SI units, mass is kilograms and acceleration is meters per second squared, so the unit for force is kg·m/s^2. A newton is defined as the force required to accelerate a 1 kilogram mass at 1 meter per second squared, so 1 N = 1 kg·m/s^2. The unit is named for Isaac Newton. The other units correspond to different quantities: pascal is for pressure (force per area), joule is for energy or work, and watt is for power, so they do not measure force.