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Physics - Kinematics Question with Solution | TestHub

PhysicsKinematics2-D & 3DMedium2 minQB

PhysicsMediumsingle choice

Passage / Comprehension

With respect to Queens Lighthouse, Mr. Gibbs uses a technique known as "Doubling the Angle on the Bow." The figure shows the straight track (ABC) of a ship passing by the lighthouse. At point A, Mr. Gibbs measures the angle $α$ between the line of sight to the lighthouse and the ship's direction of motion. At point B, the measured angle becomes $2 α$ .

If the ship starts retarding as it passes from point B . What should be the retardation of the ship so that it stops at the point closest to the light house. Velocity of the ship at point B is $10 m / s$ , distance of the ship from light house at point B is 50 m . (Given $α = 3 0^{\circ}$ )

Options:

Answer:

Solution:

$v^{2} = u^{2} - 2$ as

$0 = 1 0^{2} - 2 \times a \times 25$

$a = 2 m / s^{2}$

Stream:JEESubject:PhysicsTopic:KinematicsSubtopic:2-D & 3D

⏱ 2mℹ️ Source: QB

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