Physics - Kinematics Question with Solution | TestHub

PhysicsKinematics2-D & 3DHard2 minQB

PhysicsHardinteger

Passage / Comprehension

An insect I crosses a cylinder of radius R with minimum jumping speed. Path of the insect is shown in figure. When insect will be just touching the cylinder at C \& D its velocity will be tangent to the cylinder at that point. At point C radius of the cylinder is making an angle $α$ from the vertical. Minimum velocity of insect is u , at an angle $θ$ from the horiozntal $[$ Given : $R = \frac{2 ( 2 - 1 )}{10} m & g = 10 m / s^{2}]$

With what minimum horizontal velocity 'u', (in m/s) can a boy throw a rock at A so that it just clear the obstruction at B

Answer:

Solution:

$- 20 = 40 tan 0 - \frac{1}{2} \frac{g \times 4 0 ^{2}}{u ^{2} c o s ^{2} 0 ^{\circ}}$

$u^{2} = \frac{1600}{4} = 400 u = 20 m / s$

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

⏱ 2mℹ️ Source: QB

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