Motion in a Straight Line Previous Year Questions — NEET Physics

2 past-year Motion in a Straight Line questions from NEET (Physics).

Q5 (2024)

The following plots show variation of velocity (v) with time (t), of a ball thrown vertically upward, and falling back. Which of the following plots is/are correct? A. {{IMG1}} B. {{IMG2}} C. {{IMG3}} D. {{IMG4}} E. {{IMG5}}
  1. C only
  2. A and E only
  3. D only
  4. B only
### Related Formula $$a = \frac{dv}{dt} = -g$$ ### Core Logic Throughout the motion, acceleration due to gravity acts downward ($a = -g$). Therefore, the slope of the velocity vs time curve must be constant and negative throughout. {{SOL_IMG1}} Hence, curve (C) is correct. ### Pattern Recognition Constant downward acceleration requires a straight line with a negative slope on a v-t graph. ### Evaluation Rubric / Model Answer null ### Chapter Mix Class 11 Physics: Motion in a Straight Line

Q30 (2024)

When a ruler falls vertically, 5 different persons catch it with different reaction times. $\left(\mathrm{g}=9.8\ \mathrm{m}\ \mathrm{s}^{-2}\right)$ A. Person A has reaction time of 0.20 s. B. Person B has reaction time of 0.22 s. C. Person C has reaction time of 0.18 s. D. Person D has reaction time of 0.19 s. E. Person E has reaction time of 0.21 s. What is the correct order of the distance travelled by the ruler for each person?
  1. C > D > A > B > E
  2. C > D > A > E > B
  3. B > E > A > C > D
  4. B > E > A > D > C
### Related Formula $$S = \frac{1}{2}g t^2$$ ### Core Logic Distance $S \propto t^2$. Larger reaction time leads to greater distance fallen. Reaction times in descending order: $t_B (0.22\text{s}) > t_E (0.21\text{s}) > t_A (0.20\text{s}) > t_D (0.19\text{s}) > t_C (0.18\text{s})$. Therefore, distances in descending order: $S_B > S_E > S_A > S_D > S_C$. ### Pattern Recognition Free fall distance increases monotonically with reaction time. ### Evaluation Rubric / Model Answer null ### Chapter Mix Class 11 Physics: Motion in a Straight Line
Rankbit System
JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%) | JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%)

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