Physics for IGCSE & O level - Forces And Motion (Section 1 - No. 3)

Which of the following statements is true regarding acceleration?

Acceleration is measured in meters per second squared (m/s²).

Acceleration is a scalar quantity.

Acceleration can be positive or negative.

Uniform acceleration means a constant change in velocity.

Acceleration is measured in m/s², can be positive or negative, and constant for uniform acceleration.