JEE Mains · Physics · STD 11 - 2. motion in straight line
Water drops are falling from a nozzle of a shower onto the floor, from a height of \(9.8\, {m}\). The drops fall at a regular interval of time. When the first drop strikes the floor, at that instant, the third drop begins to fall. Locate the position of second drop from the floor when the first drop strikes the floor. (In \(m\))
- A \(4.18\)
- B \(2.94\)
- C \(2.45\)
- D \(7.35\)
Answer & Solution
Correct Answer
(D) \(7.35\)
Step-by-step Solution
Detailed explanation
\({H}=\frac{1}{2} {gt}^{2}\) \(\frac{9.8 \times 2}{9.8}={t}^{2}\) \({t}=\sqrt{2}\, {sec}\) \(\Delta\) \(t:\) time interval between drops \({h}=\frac{1}{2} {g}(\sqrt{2}-\Delta {t})^{2}\) \(0=\frac{1}{2} {g}(\sqrt{2}-2 \Delta {t})^{2}\) \(\Delta {t}=\frac{1}{\sqrt{2}}\)…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A collimated beam of light of diameter 2 mm is propagating along x -axis. The beam is required to be expanded in a collimated beam of diameter 14 mm using a system of two convex lenses. If first lens has focal length 40 mm , then the focal length of second lens is _________ mm.JEE Mains 2026 Medium
- The energy associated with electric field is \((U_E)\) and with magnetic field is \((U_B)\) for an electromagnetic wave in free space. ThenJEE Mains 2019 Medium
- For changing the capacitance of a given parallel plate capacitor, a dielectric material of dielectric constant \(K\) is used, which has the same area as the plates of the capacitor. The thickness of the dielectric slab is \(\frac{3}{4} d\), where \('d'\) is the separation between the plates of parallel plate capacitor. The new capacitance \((C')\) in terms of original capacitance \(\left( C _{0}\right)\) is given by the following relationJEE Mains 2021 Medium
- Consider a mixture of gas molecule of types \(A, B\) and \(C\) having masses \(m_{A}\,<\,m_{B}\,<\,m_{C}\) ratio of their root mean square speeds at normal temperature and pressure is :JEE Mains 2021 Medium
-
Sliding contact of a potentiometer is in the middle of the potentiometer wire having resistance \(R_p=1 \Omega\) as shown in the figure. An external resistance of \(R_e=2 \Omega\) is connected via the sliding contact. The electric current in the circuit is :JEE Mains 2025 Medium - Solid sphere \(A\) is rotating about an axis \(PQ\). If the radius of the sphere is \(5\,cm\) then its radius of gyration about \(P Q\) will be \(\sqrt{x} \;cm\). The value of \(x\) is \(................\).
JEE Mains 2023 Medium
More PYQs from JEE Mains
- The mean of the numbers \(a, b, 8,5,10\) is \(6\) and their variance is \(6.8\). If \(M\) is the mean deviation of the numbers about the mean, then \(25\; M\) is equal toJEE Mains 2022 Hard
- If \(\int_0^{\frac{\pi }{2}} {\frac{{\cot \,x}}{{\cot \,x + \cos ec\,x}}} dx = m\left( {\pi + n} \right)\), then \(m.n\) is equal toJEE Mains 2019 Hard
- If \(A\) is the area in the first quadrant enclosed by the curve \(C: 2 x^2-y+1=0\), the tangent to \(C\) at the point \((1,3)\) and the line \(x+y=1\), then the value of \(60 A\) isJEE Mains 2023 Hard
- Let \(f: R \rightarrow R\) be a function defined by \(f(x)=\left(2\left(1-\frac{x^{25}}{2}\right)\left(2+x^{25}\right)\right)^{\frac{1}{50}}\). If the function \(g(x)=f(f(f(x)))+f(f(x))\), the the greatest integer less than or equal to \(g (1)\) isJEE Mains 2022 Hard
- Two cylindrical vessels of equal cross-sectional area \(16\,cm ^{2}\) contain water upto herghts \(100\,cm\) and \(150\,cm\) respectively. The vessels are interconnected so that the water levels in them become equal. The work done by the force of gravity during the process, is \(......J\) [Take density of water \(=10^{3}\,kg / m ^{3}\) and \(g =10\,ms ^{-2}\) ]JEE Mains 2022 Hard
- Choose the correct option from the following options given belowJEE Mains 2022 Medium