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Laws of Motion — NEET Physics MCQs

30 questions written by hand against the NCERT chapter. Every wrong option is explained, not just the right one.

30questions
10/14/6easy / medium / hard
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Sample questions from this chapter

Which event illustrates inertia?
  1. A passenger lurches forward when a moving bus stops ✓
  2. A stone accelerates while falling
  3. A spring regains shape after release
  4. A magnet attracts an iron pin
Answer: A. The passenger's body tends to retain forward motion when the bus is stopped by an external force.
Why not B: Increasing fall speed is acceleration produced by gravity, not persistence of state.
Why not C: Elastic restoration is a force response rather than inertia alone.
Why not D: Magnetic attraction explicitly changes motion through an external force.
A net force of 20 N acts on a 5 kg body. What acceleration results?
  1. 100 m s⁻²
  2. 0.25 m s⁻²
  3. 4 m s⁻² ✓
  4. 15 m s⁻²
Answer: C. From a = F/m, acceleration is 20/5 = 4 m s⁻².
Why not A: This multiplies force by mass instead of dividing by mass.
Why not B: This divides mass by force and takes the reciprocal relation.
Why not D: This subtracts mass from force despite unlike physical quantities.
A 50 N retarding force acts on a 20 kg body initially at 15 m s⁻¹. How long until it stops?
  1. 6.0 s ✓
  2. 0.3 s
  3. 37.5 s
  4. 2.5 s
Answer: A. a = F/m = 50/20 = 2.5 m s⁻², so t = u/a = 15/2.5 = 6.0 s. The 2.5 s option is the acceleration itself, quoted as a time.
Why not B: This uses the 50 N force as the acceleration (t = u/F), never dividing by the 20 kg mass.
Why not C: This inverts the mass-force ratio, taking a = m/F = 0.4 m s⁻², so 15/0.4 gives 37.5 s.
Why not D: This reports the acceleration, 2.5 m s⁻², as though it were the time; it is the rate, not the duration.

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Every NCERT question in this chapter is solved, free: NCERT solutions — Laws of Motion →

Other NEET Physics chapters

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Questions

How many NEET questions are there on Laws of Motion?

This chapter test has 30 questions — 10 easy, 14 medium and 6 hard — all written against the NCERT Class 11 chapter.

Is this NEET Physics chapter test free?

Yes. Every chapter test is free with no login, and you get your all-India rank on every one. Nothing on the site is on sale right now.

Do the questions explain the wrong options?

Yes — every distractor carries its own explanation naming the specific misconception that makes a student pick it. That is the part most question banks skip, and it is the part that changes your next attempt.