Physics IGCSE Turning Effect Quiz

What is the principle of moments?

• Sum of anticlockwise moments equals zero

• Sum of clockwise moments equals sum of forces

• Sum of clockwise moments equals zero

• Sum of clockwise moments equals sum of anticlockwise moments

What is the center of mass?

• The point where the object is most stable

• The point where the object is lightest

• The point where the entire mass of an object can be considered to be concentrated.

• The point where the object is heaviest

Explain the concept of equilibrium in terms of moments.

• Equilibrium is when the moments are unbalanced and causing the object to move

• Balance of clockwise and anticlockwise moments acting on an object

• Equilibrium is when the moments are equal but acting in the same direction

• The concept of equilibrium has nothing to do with moments

How does the distance of the force from the pivot affect the turning effect?

• It has no effect on the turning effect

• It causes the object to move in a straight line

• It decreases the turning effect

• It increases the turning effect

What is the formula for calculating the moment of a force?

• force x distance

• force x perpendicular distance

• force + distance

• force / distance

What is the difference between a clockwise and anticlockwise moment?

• Color of rotation

• Size of rotation

• Direction of rotation

• Speed of rotation

Explain the concept of a moment arm.

• The perpendicular distance from the axis of rotation to the line of action of the force.

• The amount of force exerted on an object

• The length of time it takes for a force to act on an object

• The speed at which an object rotates

How does the distribution of mass affect the stability of an object?

• It makes the object more stable

• It has no effect on stability

• It causes the object to become lighter

• It affects the stability by influencing the center of gravity and the ability to resist tipping over.