Question

Which of these is a scalar quantity acceleration, displacement, length, velocity?

Answer 1

\(\bf\huge Welcome~to~\color{#00B4ff}{Open}\color{#7cc517}{Study}~!!!\)

A scalar quantity is the measurement of a medium strictly in magnitude.
Examples would be time, speed, temperature, volume.

Vector quantities are measurements that refers to both the magnitude of the medium as well as the direction of the movement the medium has taken.
Examples are increase/decrease in temperature/speed/volume.

An acceleration is an increase in speed so this one is a vector quantity.
Displacement only shows the direction but not the magnitude so it's a vector quantity.
Length only shows the magnitude, so it's a scalar quantity.
Velocity is speed with a direction vector associated. So velocity is a vector quantity.

Answer 2

length.