Oscillations of Spring Mass System

IMPORTANT

Oscillations of Spring Mass System: Overview

This topic covers concepts such as Energy Method in Solving SHM, Parallel Arrangement of Springs, Series Arrangement of Springs, Cutting of Springs in a Ratio, Arrangement of Springs, Effective Force Constant, Angular Frequency by Force Method, etc.

Important Questions on Oscillations of Spring Mass System

HARD
IMPORTANT

For two masses attached to a spring as shown in the diagram, prove that the effective inertial mass of the system is given by

μ=m1m2m1+m2

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HARD
IMPORTANT

In which one of the following cases for two masses m1 and m2 is/are correct for their effective inertial mass μ?

EASY
IMPORTANT

For two masses m1 and m2 connected at both the ends of a spring, which one of the following relation is correct for their reduced mass?

HARD
IMPORTANT

Two identical blocks of mass m are connected via a spring of spring constant k as shown in the diagram

Two block of masses m1 and m2 are connected by a spring constant K . The  spring is initially compressed and the system is released from rest at t =  0 second .
The time period of the system when both are given a small displacement in opposite directions will be

 

EASY
IMPORTANT

A light spring of force constant 8 Nm-1 is cut into two equal halves and the two are connected in parallel; the equivalent force constant of the system is

EASY
IMPORTANT

A light spring of constant k is cut into two equal parts. The spring constant of each part is

EASY
IMPORTANT

In a spring-mass system, the length of the spring is L, and it has a mass M attached to it and oscillates with an angular frequency ω. The spring is then cut into two parts, one (a) with relaxed length αLand the other (b) with relaxed length 1-αL. The force constants of the two springs A and B are

HARD
IMPORTANT

A uniform plate of mass M stays horizontally and symmetrically on two wheels rotating in opposite directions shown in figure. The separation between the wheels is L. The friction coefficient between each wheel and the plate is μ . Find the time period of oscillation of the plate if it is slightly displaced along its length and released.

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HARD
IMPORTANT

Match the Column I with Column II:

  Column - I   Column - II
(a) Question Image (i)

T=2πmk1+k2k1k2  

(b) Question Image (ii)

T=2π2 mk

(c) Question Image (iii)

T=2πm2 k

(d) Question Image (iv) T=2πmk1+k2

MEDIUM
IMPORTANT

A trolley of mass 3 kg, as shown in figure, is connected to two identical springs, each having spring constant equal to 600 N m-1. If the trolley is displaced from its equilibrium position by 5 cm and released, the maximum speed of the trolley is:
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MEDIUM
IMPORTANT

Two springs are connected to a block of mass M placed on a frictionless surface as shown below. If both the springs have a spring constant k, then the frequency of oscillation of the block is

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MEDIUM
IMPORTANT

As shown in figure a simple harmonic motion oscillator having identical four springs has time period

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MEDIUM
IMPORTANT

If ks and kp respectively are effective spring constant in series and parallel combination of springs as shown in figure, find kskp

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MEDIUM
IMPORTANT

On a smooth inclined plane, a body of mass M is attached between two springs. The other ends of the springs are fixed to firm supports. If each spring has force constant K, the period of oscillation of the body (assuming the springs as massless) is


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MEDIUM
IMPORTANT

A spring of force constant k is cut into two pieces such that one piece is double the length of the other. Then the long piece will have a force constant of

EASY
IMPORTANT

A particle at the end of a spring executes simple harmonic motion with a period t1 , while the corresponding period for another spring is t2 . If the period of oscillation with the two springs in series is T , then -

MEDIUM
IMPORTANT

A particle at the end of a spring executes simple harmonic motion with a period t1 , while the corresponding period for another spring is t2 . If the period of oscillation with the two springs in series is T , then -

HARD
IMPORTANT

Four spring connect with mass as shown in figure. Find frequency of S.H.M.
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EASY
IMPORTANT

The time period of a mass suspended from a spring is 5 s. The spring is cut into four equal parts and the same mass is now suspended from one of its parts. The period is now

MEDIUM
IMPORTANT

A mass m is attached to four springs of spring constants 2k, 2k, k, k as shown in figure. The mass is capable of oscillating on a frictionless horizontal floor. If it is displaced slightly and released the frequency of resulting SHM would be -


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