SaraNextGen Study App [2022-23]
Last Updated On 23-10-2022 - By Sara

 A cylindrical plastic bottle of negligible mass is filled with 310 ml of water and left floating in a pond with still water. If pressed downward slightly and released, it starts performing simple harmonic motion at angular frequency . If the radius of the bottle is 2.5 cm then  close to: (density of water =103 kg/m3)

(a)

5.00 rad s−1

(b)

1.25 rad s−1

(c)

3.75 rad s−1

(d)

7.95 rad s−1


Question ID - 50282 :-

 A cylindrical plastic bottle of negligible mass is filled with 310 ml of water and left floating in a pond with still water. If pressed downward slightly and released, it starts performing simple harmonic motion at angular frequency . If the radius of the bottle is 2.5 cm then  close to: (density of water =103 kg/m3)

(a)

5.00 rad s−1

(b)

1.25 rad s−1

(c)

3.75 rad s−1

(d)

7.95 rad s−1

1 Answer
5876 Votes
3537

Answer Key : (d) -

Extra Boyant force=Axg

B0+B×mg=ma

B=ma

A=

W2=

W=

==7.95



Next Question :

A parallel plate capacitor having capacitance 12 pF is charged by a battery to a potential difference of 10 V between its plates. The charging battery is now disconnected and a porcelain slab of dielectric constant 6.5 is slipped between the plates the work done by the capacitor on the slab is :

(a)

692 pJ

(b)

60 pJ

(c)

508 pJ

(d)

560 pJ


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