IGCSE Physics: Forces, Vectors, and Momentum Quiz

Which of Newton's laws states that an object will remain at rest or in uniform motion unless acted upon by an external force?

• Newton's First Law
• Newton's Second Law
• Newton's Third Law
• Newton's Law of Gravitation

In the equation F = ma, what does 'a' represent?

• Area
• Acceleration
• Amplitude
• Altitude

What is the relationship between action and reaction forces according to Newton's Third Law?

• They are equal in magnitude and opposite in direction
• They are equal in magnitude and in the same direction
• They are unequal in magnitude and opposite in direction
• They are unequal in magnitude and in the same direction

Which of the following is NOT a characteristic of friction?

• It impedes motion
• It results in heating
• It increases speed
• It occurs between two surfaces

What is the moment of a force?

• The force multiplied by time
• The force multiplied by distance
• A measure of its turning effect
• The force divided by area

When is an object in equilibrium according to the principle of moments?

• When the sum of all forces is zero
• When the sum of clockwise moments equals the sum of anticlockwise moments
• When the object is at rest
• When the object is moving at constant velocity

What type of deformation occurs when an object returns to its original shape after a load is removed?

• Plastic deformation
• Elastic deformation
• Permanent deformation
• Irreversible deformation

What does Hooke's Law state?

• Force is inversely proportional to extension
• Force is directly proportional to extension
• Force is proportional to the square of extension
• Force is independent of extension

What is the center of mass of a body?

• The point where the object balances
• The point of maximum density
• The point where all of its mass can be considered to act
• The geometric center of the object

Which of the following is a vector quantity?

• Mass
• Time
• Temperature
• Velocity