Forces quiz

What is a force?

• A) A push or pull
• B) A type of energy
• C) A change in motion
• D) A unit of measurement

Answer explanation

A force is defined as a push or pull acting on an object.

Which of the following is a scalar quantity?

• A) Force
• B) Velocity
• C) Mass
• D) Displacement

Answer explanation

Mass is a scalar quantity, as it only has magnitude without direction.

What type of force opposes motion?

• A) Thrust
• B) Friction
• C) Upthrust
• D) Tension

Answer explanation

Friction is the force that opposes the motion of an object.

Which force acts on an object submerged in a fluid?

• A) Gravitational force
• B) Tension
• C) Upthrust
• D) Friction

Answer explanation

Upthrust, or buoyant force, acts on objects submerged in fluids.

What is the term for the total force acting on an object?

• A) Balanced force
• B) Resultant force
• C) Net force
• D) Both B and C

Answer explanation

The resultant force is the total force acting on an object, considering all acting forces.

What happens to an object when an unbalanced force acts on it?

• A) It remains stationary
• B) It moves in the direction of the force
• C) It changes shape
• D) It stops moving

Answer explanation

An unbalanced force causes an object to accelerate in the direction of the net force.

Which of the following describes weight?

• A) A scalar quantity
• B) A force measured in newtons
• C) The mass of an object
• D) The volume of an object

Answer explanation

Weight is the gravitational force acting on an object, measured in newtons.

What unit is used to measure force?

• A) Kilogram
• B) Meter
• C) Newton
• D) Joule

Answer explanation

Force is measured in newtons (N) in the International System of Units (SI).

What is Hooke's Law?

• A) Force equals mass times acceleration
• B) The extension of a spring is directly proportional to the force applied
• C) Energy cannot be created or destroyed
• D) Objects in motion remain in motion

Answer explanation

Hooke's Law states that the force needed to extend or compress a spring by some distance is proportional to that distance.

What does the term 'terminal velocity' refer to?

• A) The speed of an object at rest
• B) The highest speed reached by a falling object when the force of gravity is balanced by air resistance
• C) The initial speed of an object
• D) The speed of sound

Answer explanation

Terminal velocity is the constant speed an object reaches when the force of gravity is balanced by air resistance.