Other Physics · JEE Main previous year questions

2026 30 questions

1. Q322026 · 23 Jan 2026 · Shift 2

   A paratrooper jumps from an aeroplane and opens a parachute after $2\text{ s}$ of free fall and starts decelerating with $3{\text{ m/s}}^2$. At $10\text{ m}$ height from ground, while descending with the help of parachute, the speed of paratrooper is $5\text{ m/s}$. The initial height of the airplane is _____ m. ($g=10{\text{ m/s}}^2$)

   1. A.92.5
   2. B.62.5
   3. C.20
   4. D.82.5
   Show answer

   Answer: A

2. Q352026 · 23 Jan 2026 · Shift 2

   A body of mass $14\mathrm{kg}$ initially at rest explodes and breaks into three fragments of masses in the ratio $2:2:3$. The two pieces of equal masses fly off perpendicular to each other with a speed of $18m/s$ each. The velocity of the heavier fragment is ____ $m/s$.

   1. A.$24\sqrt{2}$
   2. B.12
   3. C.$12\sqrt{2}$
   4. D.$10\sqrt{2}$
   Show answer

   Answer: C

3. Q272026 · 21 Jan 2026 · Shift 1

   A $4\mathrm{kg}$ mass moves under the influence of a force $\vec{F}=\left(4t^3\hat{i}-3t\hat{j}\right)\mathrm{N}$ where $t$ is the time in second. If mass starts from origin at $t=0$, the velocity and position after $t=2\mathrm{s}$ will be:

   1. A.$\vec{v}=3\hat{i}+\frac{3}{2}\hat{j}\vec{r}=\frac{6}{5}\hat{i}+\hat{j}$
   2. B.$\vec{v}=4\hat{i}-\frac{3}{2}\hat{j}\vec{r}=\frac{6}{5}\hat{i}-\hat{j}$
   3. C.$\vec{v}=4\hat{i}-\frac{3}{2}\hat{j}\vec{r}=\frac{8}{5}\hat{i}-\hat{j}$
   4. D.$\vec{v}=4\hat{i}+\frac{5}{2}\hat{j}\vec{r}=\frac{8}{5}\hat{i}+2\hat{j}$
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   Answer: C

4. Q422026 · 21 Jan 2026 · Shift 1
   
   1. A.$100\sqrt{3}$
   2. B.$\frac{200}{\sqrt{3}}$
   3. C.$200\sqrt{6}$
   4. D.$200\sqrt{3}$
   Show answer

   Answer: D

5. Q302026 · 21 Jan 2026 · Shift 2

   The r.m.s. speed of oxygen molecules at 47 °C is equal to that of the hydrogen molecules kept at _________ °C. (Mass of oxygen molecule/mass of hydrogen molecule = 32/2)

   1. A.-100
   2. B.-253
   3. C.-20
   4. D.-235
   Show answer

   Answer: B