Multiple choice general knowledge science & technology

If you apply twice the force on an object for twice the time, there will be a change in velocity that will be a (an)....

  1. 8 fold increase

  2. 4 fold increase

  3. 2 fold increase

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Using impulse-momentum theorem: impulse J = F × t = Δp = mΔv. When force doubles (2F) and time doubles (2t), impulse becomes 2F × 2t = 4Ft, which is 4 times the original. Since mass is constant, velocity change also increases 4-fold. The 8-fold option incorrectly multiplies only the force, while 2-fold ignores one factor.

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