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ISRO ME 2019 ENGINEERING MECHANICS 3

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Question 1

The motion of a particle is defined by the relation x=(5t2/2) - 20t+10, where x and t are expressed in meters and seconds respectively. The position x of the particle at zero velocity is-

Question 2

A plate of mass M is placed on horizontal frictionless surface (see figure), and a body of mass m is placed on this plate. The coefficient of dynamic friction between this body and the plate is. If a force  mg is applied to the body of mass m along the horizontal, the acceleration of the plate will be

Question 3

Two block of weight 50 N and 30 N respectively are connected by a light string passing over a smooth friction less pulley. The acceleration with which the weights move ?

Question 4

The coefficient of friction depends on

Question 5

The given structure is designed to be used for construction of heavy duty crane arm. The following truss is :

The above truss is deficient, statically determinate or indeterminate by ______ degrees.

Question 6

A person standing on a uniformly rotating turn table has his arms held close to his chest. If he outstretches his arms

Question 7

An elevator weighing 500 kg is to be lifted up at a constant velocity of 0.20 m/s. What would be the minimum horsepower of the motor to be used?

Question 8

A weight of 3000 N is supported by two chains AC and BC as shown. T1 and T2 are the tensions in each chain. The value of is?
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Question 9

Coefficient of restitution is

Question 10

Two bodies A and B of mass m and 2 m respectively are placed on a smooth floor. They are connected by a spring of negligible mass. A third body C of mass m is placed on the floor. The body C moves with a velocity v0 along the line joining A and B and collides elastically with A. At a certain time after the collision it is found that the instantaneous velocities of A and B are same and the compression of the spring is xo. The spring constant k will be
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