WBJEE · Physics · Motion In Two Dimensions
A fighter plane, flying horizontally with a speed \(360 \mathrm{kmph}\) at an altitude of \(500 \mathrm{~m}\) drops a bomb for a target straight ahead of it on the ground. The bomb .should be dropped at what approximate distance ahead of the target ? Assume that acceleration due to gravity \((\mathrm{g})\) is \(10 \mathrm{~ms}^{-2}\). Also neglect air drag
- A \(1000 \mathrm{~m}\)
- B \(50 \sqrt{5} \mathrm{~m}\)
- C \(500 \sqrt{5} \mathrm{~m}\)
- D \(866 \mathrm{~m}\)
Answer & Solution
Correct Answer
(A) \(1000 \mathrm{~m}\)
Step-by-step Solution
Detailed explanation
Hint: \(v=360 \mathrm{~km} / \mathrm{h}=100 \mathrm{~m} / \mathrm{s} .\) \(\mathrm{h}=500 \mathrm{~m}\) \(\mathrm{R}=\mathrm{u} \sqrt{\frac{2 \mathrm{~h}}{\mathrm{~g}}}=100 \times \sqrt{\frac{2 \times 500}{10}}=1000 \mathrm{~m}\)
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
- For air at room temperature, the atmospheric pressure is \(1.0 \times 10^{5} \mathrm{Nm}^{-2}\) and density of ait is \(1.2 \mathrm{kgm}^{-3}\). For a tube of length \(1.0 \mathrm{m}\), closed at one end, the lowest frequency \(\begin{array}{lllllll}\text { generated is } & 84 & \text { Hz. } & \text { The } & \text { value } & \text { of } \boldsymbol{\gamma}\end{array}\) (ratio of two specific heats) for air isWBJEE 2016 Hard
- If \(\chi\) stands for the magnetic susceptibility of a substance, \(\mu\) for its magnetic permeability and \(\mu_{0}\) for the permeability of free space, thenWBJEE 2017 Easy
- Angle between an equipotential surface and electric lines of force isWBJEE 2016 Easy
- A circular disc rolls on a horizontal Iloor without slipping and the centre of the disc moves with a uniform velocity \(v\). Which of the following values of the velocily at a point on the rim of the disc can have?WBJEE 2015 Medium
- The water equivalent of a calorimeter is \(10 \mathrm{g}\) and it contains \(50 \mathrm{g}\) of water at \(15^{\circ} \mathrm{C}\). Some amount of ice, initially at \(-10^{\circ} \mathrm{C}\) is dropped in it and half of the ice melts till equilibrium is reached. What was the initial amount of ice that was dropped (when specific heat of ice \(=0.5 \mathrm{cal} \mathrm{gm}^{-1}{ }^{\circ} \mathrm{C}^{-1},\) specific heat of water \(=1.0\)
cal \(\mathrm{gm}^{-1 \circ} \mathrm{C}^{-1}\) and latent heat of melting of ice \(=80\) cal \(\mathrm{gm}^{-1}\) )?WBJEE 2018 Medium - Two particles have masses \(\mathrm{m} \& 4 \mathrm{~m}\) and their kinetic energies are in the ratio \(2: 1\). What is the ratio of their linear momenta?WBJEE 2009 Easy
More PYQs from WBJEE
- A ray of light is incident on a right angled isosceles prism parallel to its base as shown in the figure. Refractive index of the material of the prism is \(\sqrt{2}\). Then. which of the following statement(s) is/are true?
WBJEE 2018 Medium - A given amount of \(\mathrm{Fe}^{2+}\) is oxidized by \(\mathrm{x}\) mol of \(\mathrm{MnO}_{4}\) in acidic medium. The number of moles of \(\mathrm{Cr}_{2} \mathrm{O}_{7}{ }^{2-}\) required to oxidize the same amount of \(\mathrm{Fe}^{2+}\) in acidic medium isWBJEE 2021 Medium
- ADP and ATP differ in the number ofWBJEE 2017 Easy
- Which of the following orbitals will have zero probability of finding the electron in the yz plane ?WBJEE 2010 Easy
- Let \(I_{1}=\int_{0}^{n}[x] d x\) and \(I_{2}=\int_{0}^{n}\{x\} d x,\) where \([x]\)
and \(\{x\}\) are integral and fractional parts of \(x\) and \(n \in N-\{1\} .\) Then, \(I_{1} / I_{2}\) is equal toWBJEE 2017 Medium - \(\mathrm{P}_4 \mathrm{O}_{10}\) is the anhydride ofWBJEE 2010 Easy