AIEEE 2006 | Simple Harmonic Motion Question 148 | Physics

A coin is placed on a horizontal platform which undergoes vertical simple harmonic motoin of angular frequency $$\omega .$$ The amplitude of oscillation is gradually increased. The coin will leave contact with the platform for the first time

at the mean position of the platform

for an amplitude of $${g \over {{\omega ^2}}}$$

For an amplitude of $${{{g^2}} \over {{\omega ^2}}}$$

at the height position of the platform

AIEEE 2006

MCQ (Single Correct Answer)

-1

Starting from the origin a body oscillates simple harmonically with a period of $$2$$ $$s.$$ After what time will its kinetic energy be $$75\% $$ of the total energy?

$${1 \over 6}s$$

$${1 \over 4}s$$

$${1 \over 3}s$$

$${1 \over 12}s$$

AIEEE 2005

MCQ (Single Correct Answer)

-1

If a simple harmonic motion is represented by $${{{d^2}x} \over {d{t^2}}} + \alpha x = 0.$$ its time period is

$${{2\pi } \over {\sqrt \alpha }}$$

$${{2\pi } \over \alpha }$$

$$2\pi \sqrt \alpha $$

$$2\pi \alpha $$