Understanding Laws of Motion

What is Newton's First Law of Motion?

• An object will accelerate if no force is applied.

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

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

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

Define inertia in the context of Newton's First Law.

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

• Inertia is the speed of an object in motion.

• Inertia is the tendency of an object to resist changes in its state of motion.

• Inertia is the mass of an object multiplied by its velocity.

What is the formula for calculating force according to Newton's Second Law?

• F = m * a

• F = m - a

• F = m / a

• F = m + a

Explain the relationship between mass and acceleration in Newton's Second Law.

• Acceleration is independent of mass in Newton's Second Law.

• Mass and acceleration are directly related; as mass increases, acceleration also increases.

• Increasing mass has no effect on acceleration regardless of the force applied.

• Mass and acceleration are inversely related in Newton's Second Law; as mass increases, acceleration decreases for a constant force.

State Newton's Third Law of Motion.

• For every force, there is a corresponding force in the same direction.

• An object at rest will remain at rest unless acted upon by a force.

• The acceleration of an object is directly proportional to the net force acting on it.

• For every action, there is an equal and opposite reaction.

Give an example of action and reaction forces as per Newton's Third Law.

• A person sitting on a chair pushes the chair downwards.

• A balloon deflating pushes air out in all directions.

• A person jumping off a boat pushes the boat backward.

• A car accelerating forward pushes the ground backward.

What are the different types of forces?

• Centrifugal forces and elastic forces.

• Contact forces and non-contact forces.

• Frictional forces and gravitational forces.

• Magnetic forces and thermal forces.

Define gravitational force and give its unit.

• Newton (N)

• Pascal (Pa)

• Joule (J)

• Kilogram (kg)

What is the significance of net force in motion?

• Net force has no effect on an object's speed.

• Net force determines the acceleration and motion of an object.

• Net force is irrelevant in a vacuum.

• Net force only affects the color of an object.

Explain the concept of uniform motion.

• Uniform motion is when an object accelerates in a straight line.

• Uniform motion is the motion of an object moving at a constant speed in a straight line.

• Uniform motion refers to an object that is at rest and not moving.

• Uniform motion involves changing speed in a circular path.