Physics - Kinematics Question with Solution | TestHub

PhysicsKinematics2-D & 3DEasy2 minPYQ_2020

PhysicsEasysingle choice

A rifle with a muzzle velocity of $100 m s^{- 1}$ shoots a bullet at a small target $30 m$ away in the same horizontal line. How high above the target must the gun be aimed so that the bullet will hit the target?

Options:

Answer:

Solution:

$30 = \frac{u^{2} sin2 θ}{g} \Rightarrow 30 \times 10 = 10 0^{2} sin 2 θ$

$sin2 θ = 0.03 \Rightarrow 2 θ = 0.03$

$θ = 0.015 \Rightarrow tan θ = 0.015$

$\frac{h}{30} = 0.015 \Rightarrow h = 0.45 m$

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

⏱ 2mℹ️ Source: PYQ_2020

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