Lakshmi shaji

Maximum frictional force experienced by the body before it just begins to move?

• Static friction

• Dynamic friction

• Limiting friction

• Rolling friction

Ratio of limiting friction to normal reaction

• Angle of friction

• Angle of limiting friction

• Coefficient of friction

• Cone of friction

Angle bitween normal reaction and resultant of normal reaction and friction

• Angle of friction

• Coefficient of friction

• Angle of limiting friction

• Cone of friction

Maximum inclination of a plane with respect to horizontal such that the body kept in a is verge of moving down

• Angle of limiting friction

• Angle of friction

• Angle of repose

• None of these

Resistance to be overcome by machines

• Effert

• Load

• Both a and b

• None of these

Force required to overcome resistance

• Effert

• Load

• Both a and b

• None of these

Work done by effert

• Output

• Input

• Efficiency

• None of these

Efficiency equal to

• Output/ input

• Input/ output

• Mechanical advantage/ velocity ratio

• Both a and c

For an ideal machine efficiency equal to

• 100%

• 90%

• 20%

• 50%

Velocity ratio

• Distance moved by effert/distance moved by load

• Output/ input

• Mechanical advantage/ velocity ratio

• None of these