How to calculate velocity when force and time are given?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
If you know force, time, and mass, use Newton's second law combined with kinematics:
v = (F/m) × t + u
where F is force, m is mass, t is time, and u is initial velocity (0 if starting from rest).
Understanding the formula:
- F/m gives you acceleration (from F = ma)
- Then use v = u + at
- If starting from rest, v = (F/m) × t
Example: A 10 kg object experiences 20 N force for 5 seconds from rest: v = (20/10) × 5 = 10 m/s.
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