Applied Mechanics and Graphic Statics
One end of an elastic string of natural length / and modulus X is kept fixed while to the other end is attached a particle of mass m which is hanging freely under gravity. The particle is pulled down vertically through a distance x, held at rest and then released. The motion is

None of these
a rectilinear motion with constant speed
a damped oscillatory motion
a simple harmonic motion

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Applied Mechanics and Graphic Statics
One end of an elastic string of natural length / and modulus X is kept fixed while to the other end is attached a particle of mass m which is hanging freely under gravity. The particle is pulled down vertically through a distance x, held at rest and then released. The motion is

a simple harmonic motion
a rectilinear motion with constant speed
None of these
a damped oscillatory motion

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Applied Mechanics and Graphic Statics
Newton's law of Collision of elastic bodies states that when two moving bodies collide each other, their velocity of separation

Is directly proportional to their velocity of approach
Is equal to the sum of their velocities of approach
Is inversely proportional to their velocity of approach
Bears a constant ratio to their velocity of approach

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Applied Mechanics and Graphic Statics
The maximum displacement of a particle executing S.H.M. corresponds to

Zero kinetic energy and maximum potential energy
Zero potential energy and maximum kinetic energy
Maximum kinetic energy and maximum potential energy
Minimum kinetic energy and minimum potential energy

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