Concepts

External force required to make a body move in circular path in uniform speed

Angle of inclined plane at which the body slides down

Angle between resultant of limiting friction and normal reaction to that of normal reaction

Opposing force when one body slides over another body’s surface

Three forces are said to be in equilibrium when each force is proportional to the sine of the other two forces

If no external force acts, the total momentum remains unchanged

Average force acting during the impact and the time for which it lasts

Every action has an equal and opposite reaction

Rate of change of momentum is directly proportional to the external force applied in the direction of force

Every body continues to be in rest or uniform motion unless compelled by external force