NUST NET Physics chapter 2: Physics · Mechanics MCQs with answers

By Team Megalecture · Updated 4 Nov 2026

61 exam-style questions on Physics · Mechanics, each with the answer and a short explanation. Ten of them are below to try. The chapter test draws ten fresh questions each time and is marked the moment you finish, with your score by topic.

61 questions · 4 topics · 10 per test

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What chapter 2 covers

Ten Physics · Mechanics questions with answers

Try each one, then open the answer. These ten stay the same; the test draws new ones every time.

1. A body moving with uniform acceleration has a velocity of 10 m s−1 at t = 0 and 30 m s−1 at t = 4.0 s. The distance it covers in these 4.0 s is

  1. A
    40 m
  2. B
    80 m
  3. C
    120 m
  4. D
    160 m
Show answer

Answer: B. Distance = average velocity × time = ½(10 + 30) × 4.0 = 80 m, the area under the v-t graph. 40 m counts only the triangle above 10 m s−1; 120 m uses the final velocity.

2. A 2.0 kg mass is raised through a height of 3.0 m. Its gain in gravitational potential energy is

  1. A
    6.0 J
  2. B
    29.4 J
  3. C
    58.8 J
  4. D
    5.88 J
Show answer

Answer: C. ΔPE = mgh = 2.0 × 9.8 × 3.0 = 58.8 J. 6.0 J leaves out g, and 29.4 J brings in a stray ½.

3. A 0.20 kg ball is dropped from a height of 5.0 m and rebounds to 3.2 m. Taking g = 10 m s−2, the energy lost in the bounce is

  1. A
    6.4 J
  2. B
    3.6 J
  3. C
    1.8 J
  4. D
    10 J
Show answer

Answer: B. Loss = mg(h1 − h2) = 0.20 × 10 × 1.8 = 3.6 J. 10 J is the whole starting energy and 6.4 J is the energy kept after the bounce.

4. Water leaves a tap of cross-sectional area 1.0 cm2 at 1.0 m s−1 and falls freely. Taking g = 10 m s−2, the cross-sectional area of the stream 15 cm below the tap is

  1. A
    0.25 cm2
  2. B
    0.50 cm2
  3. C
    0.71 cm2
  4. D
    2.0 cm2
Show answer

Answer: B. v2 = 1.02 + 2 × 10 × 0.15 = 4.0, so v = 2.0 m s−1; by continuity the area halves to 0.50 cm2. 0.25 cm2 divides by v2 instead of v.

5. The SI unit of the coefficient of viscosity is

  1. A
    N m−2 s−1
  2. B
    N m s−1
  3. C
    kg m s−1
  4. D
    N s m−2
Show answer

Answer: D. From F = 6πηrv, η = F/(6πrv) has the unit N ÷ (m × m s−1) = N s m−2, also written Pa s.

6. A car starts from rest and its speed rises uniformly to 12 m s−1 in 4 s. It then keeps this speed for another 6 s. The total distance covered is

  1. A
    72 m
  2. B
    96 m
  3. C
    120 m
  4. D
    48 m
Show answer

Answer: B. Distance = area under the v–t graph = ½ × 4 × 12 + 12 × 6 = 24 + 72 = 96 m. 120 m treats the whole 10 s as if the car were at 12 m s−1 throughout.

7. Impulse has the same unit as

  1. A
    force
  2. B
    work
  3. C
    momentum
  4. D
    power
Show answer

Answer: C. Impulse = FΔt = Δp, so its unit N s is the same as kg m s−1, the unit of momentum.

8. A satellite orbiting just above the Earth's surface has orbital speed v0. Another satellite orbits at a height above the surface equal to the Earth's radius. Its orbital speed is

  1. A
    v0/2
  2. B
    v0/√2
  3. C
    √2 v0
  4. D
    v0/4
Show answer

Answer: B. v = √(GM/r), and the orbit radius is R + R = 2R, so v = v0/√2. v0/2 wrongly takes v ∝ 1/r.

9. A hoop of mass m rolls without slipping along a level floor with speed v. Its total kinetic energy is

  1. A
    ½mv2
  2. B
    ¾mv2
  3. C
    mv2
  4. D
    2mv2
Show answer

Answer: C. Translational KE = ½mv2 and rotational KE = ½(mr2)(v/r)2 = ½mv2, so the total is mv2. ¾mv2 is the answer for a disc.

10. A steady power of 8.0 W is delivered to a 4.0 kg body that starts from rest on a smooth level surface. Its speed after 4.0 s is

  1. A
    2.0 m s−1
  2. B
    4.0 m s−1
  3. C
    8.0 m s−1
  4. D
    16 m s−1
Show answer

Answer: B. Work done = Pt = 32 J = ½mv2, so v2 = 2 × 32/4.0 = 16 and v = 4.0 m s−1. 16 is the value of v2, and 8.0 m s−1 wrongly sets Pt equal to mv.

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Ways to practise this chapter

Physics · Mechanics: questions students ask

How many Physics · Mechanics MCQs are there?

61, each with the answer and a short explanation, across 4 topics: Motion and force, Work, energy and power, Circular and rotational motion, Fluid dynamics. Every chapter test draws ten of them, so you can take it many times.

Is the NUST NET Physics chapter 2 test free?

Yes. The test, the answers and the explanations are free and need no sign-up. Sign in only if you want your scores kept across devices.

How is the chapter test marked?

The moment you press Finish: your score, the right answer and an explanation for every question, and the ones you got wrong saved in My mistakes to retry.

Can I read the explanations in Urdu?

Yes. In practice mode and on your results you can switch the explanations to Urdu.

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