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ESE 2019: Engineering Mechanics Quiz-2

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Question 1

A ball of weight 100 N is tied to a smooth wall by a cord making an angle of 30 ° to the wall.
The tension is the cord is :

Question 2

Two steel balls of 2 kg and 4 kg mass, respectively are pressed on the two ends of a spring, all pre-placed on a smooth surface. When released, the smaller ball moves with an acceleration of 2 m/s2. The simultaneous acceleration of the bigger ball will be :

Question 3

A car of mass 1450 kg is constructed on a chassis supported by four springs. Each spring has a force constant of 40000 N/m. The combined mass of the two people occupying the car is 150 kg. What is the period of execution of two complete vibrations?

Question 4

The weight of two people standing on a see saw at points A and B are measures 300N and 200N respectively. If the see saw is resting on its supports and weighs 500N, find the upward force P?

Question 5

Find the expression for couple moment as shown in figure?

Question 6

If m is the number of unknown member forces and c be the number of unknown components which is statically determinate with j being number of joints, then degree of internal indeterminacy will be:

Question 7

From the figure, find the moment about every coordinate axes of force exerted by wire at point C. If the force is   426i+710j-1065k

Question 8

Which among the following condition shows that the truss is unstable externally?

Question 9

A scale is pivoted at one end which can move freely while other end carries a spring balance as shown in figure. If a 200N weight is hung at a distance of 40 cm from the pivot, then what will be the measuring of spring balance?

Question 10

Rahul lifts a box up and kept the box in the next room. While lifting the box, Rahul moved with constant speed and kept the box in other room. Find the work done by Rahul on the box while walking across the floor at constant speed?
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