1

JEE Main 2018 (Online) 15th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

Two simple harmonic motions, as shown below, are at right angles. They are combined to form Lissajous figures.

x(t) = A sin (at + $$\delta $$)

y(t) = B sin (bt)

Identify the

x(t) = A sin (at + $$\delta $$)

y(t) = B sin (bt)

Identify the

**correct**match below.2

JEE Main 2017 (Online) 9th April Morning Slot

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

A block of mass 0.1 kg is connected to an elastic spring of spring constant 640 Nm

^{−1}and oscillates in a damping medium of damping constant 10^{−2}kg s^{−1}. The system dissipates its energy gradually. The time taken for its mechanical energy of vibration to drop to half of its initial value, is closest to :3

JEE Main 2017 (Online) 8th April Morning Slot

MCQ (Single Correct Answer)

+4

-1

A 1 kg block attached to a spring vibrates with a frequency of 1 Hz on a frictionless horizontal table. Two springs identical to the original spring are attached in parallel to an 8 kg block placed on the same table. So, the frequency of vibration of the 8 kg block is :

4

JEE Main 2017 (Online) 8th April Morning Slot

MCQ (Single Correct Answer)

+4

-1

The ratio of maximum acceleration to maximum velocity in a simple harmonic motion is 10 s

^{−1}. At, t = 0 the displacement is 5 m. What is the maximum acceleration ? The initial phase is $${\pi \over 4}$$.Questions Asked from Simple Harmonic Motion (MCQ (Single Correct Answer))

Number in Brackets after Paper Indicates No. of Questions

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