Question

multiple - choice question
what are the units for force?
m/s
m/s²
kg
n

Explanation:

Force is calculated using Newton's second law \(F = ma\) (where \(m\) is mass in kg and \(a\) is acceleration in \(m/s^{2}\)). The unit of force is named after Isaac Newton. When \(m = 1\space kg\) and \(a=1\space m/s^{2}\), \(F=(1\space kg)\times(1\space m/s^{2}) = 1\space kg\cdot m/s^{2}\), and \(1\space kg\cdot m/s^{2}=1\space N\) (Newton).

• \(m/s\) is the unit of velocity (from \(v=\frac{d}{t}\), where \(d\) is distance in meters and \(t\) is time in seconds).
• \(m/s^{2}\) is the unit of acceleration (from \(a = \frac{\Delta v}{\Delta t}\), where \(\Delta v\) is change in velocity in \(m/s\) and \(\Delta t\) is change in time in seconds).
• \(kg\) is the unit of mass.

Answer:

N