Question:
A helicopter is flying horizontally with a speed ' $v$ ' at an altitude 'h' has to drop a food packet for a man on the ground. What is the distance of helicopter from the man when the food packet is dropped?
$\sqrt{\frac{2 g h v^{2}+1}{h^{2}}}$
$\sqrt{2 \mathrm{ghv}^{2}+\mathrm{h}^{2}}$
$\sqrt{\frac{2 v^{2} h}{g}+h^{2}}$
$\sqrt{\frac{2 g h}{v^{2}}}+h^{2}$
Correct Option: , 3
Solution:
$R=\sqrt{\frac{2 h}{g}} \cdot v$
$\mathrm{D}=\sqrt{\mathrm{R}^{2}+\mathrm{h}^{2}}$
$=\sqrt{\left(\sqrt{\frac{2 h}{g}} \cdot v\right)^{2}+h^{2}}$
$D=\sqrt{\frac{2 h v^{2}}{g}+h^{2}}$
Option (3) is correct
Comments
rishab sawlani - June 21, 2022, 1:53 p.m.
worst answer ever
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- JEE Main
- Exam Pattern
- Previous Year Papers
- PYQ Chapterwise
- Physics
- Kinematics 1D
- Kinemetics 2D
- Friction
- Work, Power, Energy
- Centre of Mass and Collision
- Rotational Dynamics
- Gravitation
- Calorimetry
- Elasticity
- Thermal Expansion
- Heat Transfer
- Kinetic Theory of Gases
- Thermodynamics
- Simple Harmonic Motion
- Wave on String
- Sound waves
- Fluid Mechanics
- Electrostatics
- Current Electricity
- Capacitor
- Magnetism and Matter
- Electromagnetic Induction
- Atomic Structure
- Dual Nature of Matter
- Nuclear Physics
- Radioactivity
- Semiconductors
- Communication System
- Error in Measurement & instruments
- Alternating Current
- Electromagnetic Waves
- Wave Optics
- X-Rays
- All Subjects
- Physics
- Motion in a Plane
- Law of Motion
- Work, Energy and Power
- Systems of Particles and Rotational Motion
- Gravitation
- Mechanical Properties of Solids
- Mechanical Properties of Fluids
- Thermal Properties of matter
- Thermodynamics
- Kinetic Theory
- Oscillations
- Waves
- Electric Charge and Fields
- Electrostatic Potential and Capacitance
- Current Electricity
- Thermoelectric Effects of Electric Current
- Heating Effects of Electric Current
- Moving Charges and Magnetism
- Magnetism and Matter
- Electromagnetic Induction
- Alternating Current
- Electromagnetic Wave
- Ray Optics and Optical Instruments
- Wave Optics
- Dual Nature of Radiation and Matter
- Atoms
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