# OSCILLATIONS (TEST-4)

The time period of a mass suspended from a spring is T. If the spring is cut into four equal parts and the same mass is suspended from one of the parts, then the new time period is ____.
T
2 T
A weightless spring of length 60 cm and force constant 200 N/m is kept straight and unscratched on a smooth horizontal table and its ends are rigidly fixed. A mass of 0.25 kg is attached at the middle of the spring and is slightly displaced along the length. The time period of the oscillation of the mass is ____.
If a spring extends by x on loading, then energy stored by the spring is (if T is the tension in the spring and K is the spring constant) ____.
/
2 : 1
1 : 2
4 : 1
1 : 4
When a body of mass 1.0 kg is suspended from a certain light spring hanging vertically, its length increases by 5 cm. By suspending 2.0 kg block to the spring and if the block is pulled through 10 cm and released the maximum velocity in it in m/s is: (Acceleration due to gravity=10m/s2) ____.
0.5
1
2
4
/
4 cm
3 cm
2 cm
1 cm
To make the frequency double of a spring oscillator, we have to ____.
reduce the mass to one fourth
double of mass
half of the mass
Infinite springs with force constant k, 2k, 4k and 8k.... respectively are connected in series. The effective force constant of the spring is ____.
2 K
K
2048
/
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OSCILLATIONS AND SIMPLE HARMONIC MOTION

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