Strength of Materials
Which of the following is the example of lever of first order?

All of the listed here
Pair of scissors
Pair of clinical tongs
Arm of man

ANSWER DOWNLOAD EXAMIANS APP

Strength of Materials
A semi-circular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi-cricular disc and horizontal surface is i. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will

slant down towards direction of pull
unpredictable
remain horizontal
slant up towards direction of pull

ANSWER DOWNLOAD EXAMIANS APP

Strength of Materials
Coefficient of friction is the

ratio of limiting friction and normal reaction
angle between normal reaction and the resultant of normal reaction and the limiting friction
the friction force acting when the body is just about to move
the friction force acting when the body is in motion

ANSWER DOWNLOAD EXAMIANS APP