Moments, Torque, Centre of Gravity, Archimedes Principle_1

What is the defining equation of Newton's second law?

• F = mgh

• F = mv

• F = ma

• F = m

What is the unit of density?

• Meters per second squared

• Kilograms per meter cubed

• Newtons per meter squared

• Kilograms per meter

What is the unit of pressure?

• Kilograms per meter

• Newtons per meter squared

• Meters per second squared

• Kilograms per meter cubed

What is the principle of moments?

• The sum of the anti-clockwise moments is less than the sum of the clockwise moments

• The sum of the anti-clockwise moments is not equal to the sum of the clockwise moments

• The sum of the anti-clockwise moments is greater than the sum of the clockwise moments

• The sum of the anti-clockwise moments is equal to the sum of the clockwise moments

What is the formula for the pressure of a fluid at a height h below the surface of the fluid?

• Density * Height * g / Area

• Density * Area * Height * g

• Density * Height * g

• Density * Volume * g / Area

What is Archimedes principle?

• The up thrust is greater than the weight of the liquid that has been displaced

• The up thrust is less than the weight of the liquid that has been displaced

• The up thrust is not equal to the weight of the liquid that has been displaced

• The up thrust is equal to the weight of the liquid that has been displaced

What is the center of gravity?

• A point at which the entire mass of an object seems to act

• A point at which the entire force of an object seems to act

• A point at which the entire volume of an object seems to act

• A point at which the entire weight of an object seems to act

What is the definition of a force couple?

• Two unequal and opposite forces acting in different planes

• Two equal and opposite forces acting in the same plane

• Two equal and opposite forces acting in different planes

• Two unequal and opposite forces acting in the same plane

What is the definition of torque?

• The sum of the force and the perpendicular distance from the pivot point to the line of action of the force

• The subtraction of the force and the perpendicular distance from the pivot point to the line of action of the force

• The product of the force and the perpendicular distance from the pivot point to the line of action of the force

• The division of the force and the perpendicular distance from the pivot point to the line of action of the force

What is the definition of a moment of force?

• The product of the force and the perpendicular distance from the pivot point to the line of action of the force

• The sum of the force and the perpendicular distance from the pivot point to the line of action of the force

• The subtraction of the force and the perpendicular distance from the pivot point to the line of action of the force

• The division of the force and the perpendicular distance from the pivot point to the line of action of the force