Related Questions

The ratio of static friction to dynamic friction is always
A Equal to one
B Less than one
C Greater than one
D None of these
Dynamic friction as compared to static friction is
A Same
B More
C Less
D May be less of more depending on nature of surfaces and velocity
The dynamic friction is the friction experienced by a body, when the body
A is in motion
B is at rest
C just begins to slide over the surface of the other body
D none of the mentioned
The static tooth load should be __________ the dynamic load.
A Equal to
B Less than
C Greater than
D None of these
In recent times, the “dynamic brake system” is becoming popular in modern railways. The dynamic brake system coverts Kinetic energy to________:
A Potential energy
B Electricity
C Sound energy
D Magnetic energy
The static balancing is satisfactory for low speed rotors but with increasing speeds, dynamic balancing becomes necessary. This is because, the
A Unbalanced couples are caused only at higher speeds
B Unbalanced forces are not dangerous at higher speeds
C Effects of unbalances are proportional to the square of the speed
D Effects of unbalances are directly proportional to the speed
In which of the following circumstance should you use a static reference to a non static method?
A Making a method call using parent
B Making a method call using child
C Making an object call using parent
D Making an object call using child
The static friction
A bears a constant ratio to the normal reaction between the two surfaces
B is independent of the area of contact, between the two surfaces
C always acts in a direction, opposite to that in which the body tends to move
D all of the mentioned
The following is not a law of static friction:
A The force of friction always acts in a direction opposite to that in which the body tends to move
B The force of friction is dependent upon the area of contact
C The force of friction depends upon the roughness of the surface
D The magnitude of the limiting friction bears a constant ratio to the normal reaction between two surfaces
Friction produced by the formation of wakes is called the __________ friction.
A Disk
B Skin
C Form
D None of these

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