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Strength of Materials

On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be__________________?

Strength of Materials /
On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be__________________?

A. towards the wall at its upper end
B. away from the wall at its upper end
C. upwards at its upper end
D. downwards at its upper end
E. none of the above

On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be__________________? Read More »

Strength of Materials

Pick up wrong statement about friction force for dry surfaces. Friction force is________________?

Strength of Materials /
Pick up wrong statement about friction force for dry surfaces. Friction force is________________?

A. proportional to normal load between the surfaces
B. dependent on the materials of contact surface
C. proportional to velocity of sliding
D. independent of the area of contact surfaces
E. none of the above is wrong statement

Pick up wrong statement about friction force for dry surfaces. Friction force is________________? Read More »

Strength of Materials

A particle moves along a straight line such that distance (x) traversed in t seconds is given by x = t2 (t – 4), the acceleration of the particle will be given by the equation_________________?

Strength of Materials /
A particle moves along a straight line such that distance (x) traversed in t seconds is given by x = t2 (t – 4), the acceleration of the particle will be given by the equation_________________?

A. 3t2-lt
B. 3t2+2t
C. 6f-8
D. 6f-4
E. 6t2-8t

A particle moves along a straight line such that distance (x) traversed in t seconds is given by x = t2 (t – 4), the acceleration of the particle will be given by the equation_________________? Read More »

Strength of Materials