Physics Quiz

What is the difference between scalar and vector quantities?

• Scalar quantities have only magnitude, while vector quantities have both magnitude and direction.

• Scalar quantities have both magnitude and direction, while vector quantities have only magnitude.

• Scalar quantities are always positive, while vector quantities can be negative.

• Scalar quantities are measured in meters, while vector quantities are measured in seconds.

According to Newton's Third Law, what happens when two objects interact with each other?

• They exert equal and opposite forces on each other.

• They exert equal and same direction forces on each other.

• They exert unequal and opposite forces on each other.

• They exert unequal and same direction forces on each other.

Which of the following is an example of a non-contact force?

• Friction

• Air-resistance

• Tension

• Gravitational force

What is the resultant force?

• The sum of the magnitudes of the forces if they act in the same direction.

• The difference between the magnitudes of the forces if they act in opposite directions.

• Both A and B.

• None of the above.

What does a free body diagram use to show all of the forces acting on a single object?

• Dots and lines

• Arrows

• Circles

• Squares

Where is the centre of mass for a flat symmetrical object?

• At the top of the object

• At the bottom of the object

• Where the axes of symmetry meet

• At the left side of the object

What is the point through which the weight of an object can be considered to act?

• Centre of gravity

• Centre of mass

• Centre of force

• Centre of weight

What is an example of a contact force?

• Magnetic force

• Gravitational force

• Friction

• Electrostatic force

What does Newton's First Law state about the velocity, speed, and/or direction of an object?

• They will change if a resultant force is acting on it.

• They will remain the same if a resultant force is acting on it.

• They will change if no resultant force is acting on it.

• They will remain the same if no resultant force is acting on it.

What is the effect of resolving a single force into two component forces at right angles to each other?

• The two component forces added together give the same effect as the single force.

• The two component forces cancel each other out.

• The two component forces are weaker than the single force.

• The two component forces are stronger than the single force.