Physics MCQ Set 01

What is Newton's First Law of Motion?

• An object will change direction only when a force is applied.

• An object will accelerate unless a force is applied.

• An object will remain at rest or in uniform motion unless acted upon by an external force.

• An object in motion will eventually stop without any force.

Which law states that force equals mass times acceleration?

• Newton's Third Law of Motion

• Newton's First Law of Motion

• Newton's Second Law of Motion

• Law of Universal Gravitation

What is the unit of force in the International System of Units?

• watt (W)

• pascal (Pa)

• newton (N)

• joule (J)

If an object is at rest, what will cause it to move?

• The object will start moving if it is observed.

• A net external force applied to the object.

• Gravity will pull the object into motion.

• The object will move on its own over time.

What is the relationship between mass and weight?

• Weight is independent of gravity.

• Weight is the force due to gravity acting on mass.

• Weight is the same as mass.

• Mass is the force acting on weight.

How do you calculate the net force acting on an object?

• Net force is the vector sum of all individual forces acting on an object.

• Net force is the difference between the largest and smallest forces.

• Net force is the average of all forces acting on the object.

• Net force is the total mass of the object.

What does the term 'inertia' refer to?

• Inertia is the resistance of an object to any change in its motion.

• Inertia refers to the speed of an object in motion.

• Inertia is the energy stored in an object at rest.

• Inertia is the force that causes an object to move faster.

What is the effect of friction on motion?

• Friction enhances motion and speeds up moving objects.

• Friction has no effect on motion whatsoever.

• Friction only affects stationary objects and not those in motion.

• Friction opposes motion and can slow down or stop moving objects.

How is speed different from velocity?

• Speed is a scalar quantity; velocity is a vector quantity that includes direction.

• Speed and velocity are interchangeable terms with no differences.

• Speed measures distance over time; velocity measures speed only.

• Speed is a vector quantity; velocity is a scalar quantity.

What is the significance of the gravitational constant?

• It is used to calculate the mass of an object.

• It defines the shape of the universe.

• It measures the speed of light in a vacuum.

• The gravitational constant is significant because it determines the strength of gravitational interactions between masses.