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55.

The potential energy of a particle falling through a straight shaft drilled through the earth (assumed homogenous and spherical) is proportional to
where r is the distance of'the particle from centre of the earth                        
A. log r B. r
C. r2 D. 1/r



56.

Joule is the unit of                        
A. power B. impulse
C. work D. momentum



57.

One Newton is equivalent to                        
A. 105 dyne B. 106 dyne.
C. 107 dyne D. 981 dyne




58.

A quantity whose dimensions are M2L2 T3 could be the product of                        
A. force and pressure B. mass and power
C. energy and velocity D. force and velocity



59.

The dimensions of Gravitational Universal constant 'G' are                        
A. M-'L2r2 B. M-'L3r2
C. M-2L3T2 D. M'L3T2



60.

Williot-Mohr diagram is used to determine deflection in                        
A. trusses only B. beam only
C. rigid frames only D. any type of structure



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