Acceleration is the rate of change of velocity — measured in metres per second squared (m/s²).
Try this
3
speed gained ≈ 9.8 × t (m/s) = After 3 s, speed ≈ 29.4 m/s (about 106 km/h)
Acceleration
Units: (m/s) per second = m/s². Velocity gained = a × t.
Earth's gravity accelerates a falling object at about 9.8 m/s² (often rounded to 10). So after 1 s it's moving ≈9.8 m/s, after 2 s ≈19.6 m/s, and so on — ignoring air resistance.
Your turn
A car goes from 0 to 30 m/s in 6 seconds. What's its acceleration?
Earth's gravity gives an acceleration of about 9.8 m/s² (often rounded to 10).