Force, Mass, and the Newton (Leaving Cert Physics): Flashcards

Causes an object to change its velocity

Vector (has magnitude and direction)

Measure of how much matter an object contains

Motion (called inertia)

Kilogram (kg)

Scalar (magnitude only, no direction)

Force giving 1 kg an acceleration of $1 \text{ m s}^{-2}$

$1 \text{ kg m s}^{-2}$

$F = ma$

Force (newtons, N)

Mass (kilograms, kg)

Acceleration (metres per second squared, $\text{m s}^{-2}$)

Directly proportional

External forces only

Resultant force