A particle is thrown with a speed of 10 m/s at 6 0 ∘ with the horizontal. Its speed at the instant its velocity makes 3 0 ∘ with the horizontal is:

v = cos ϕ u cos θ = cos 3 0 ∘ 10 × 0.5 = 3 5 × 2 = 3 10 m/s. Option A.

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Physics - Kinematics Question with Solution | TestHub

PhysicsKinematics1-DMedium2 minQB

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A particle is thrown with a speed of 10 m/s at $6 0^{\circ}$ with the horizontal. Its speed at the instant its velocity makes $3 0^{\circ}$ with the horizontal is:

Options:

Answer:

Solution:

$v = \frac{u cos θ}{cos ϕ} = \frac{10 \times 0.5}{cos 3 0 ^{\circ}} = \frac{5 \times 2}{3} = \frac{10}{3}$ m/s. Option A.

Stream:JEESubject:PhysicsTopic:KinematicsSubtopic:1-D

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