Understanding Laws of Motion

What does Newton's First Law state about motion?

• An object will accelerate unless a force is applied.

• An object will change direction only if 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.

How does Newton's Second Law relate force, mass, and acceleration?

• Force is equal to acceleration divided by mass (F = a / m).

• Mass is equal to force times acceleration (m = F * a).

• Acceleration is equal to force minus mass (a = F - m).

• Force is equal to mass times acceleration (F = m * a).

Define inertia and explain its significance in motion.

• Inertia only applies to objects at rest and not in motion.

• Inertia is the speed of an object in a straight line.

• Inertia is the force that propels an object forward.

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

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

Give an example of an object demonstrating inertia.

• A ball rolling down a hill.

• A person running fast.

• A book on a table.

• A car in motion.

How does mass affect the acceleration of an object when a force is applied?

• Mass has no effect on acceleration when a force is applied.

• Greater mass always results in greater acceleration for a given force.

• Acceleration is independent of mass and only depends on the applied force.

• Mass inversely affects acceleration; greater mass results in lower acceleration for a given force.

Describe a real-world application of Newton's First Law.

• The behavior of passengers in a car that suddenly stops.

• The motion of a satellite in orbit around the Earth.

• A ball rolling down a hill without any friction.

• The acceleration of a car when the driver presses the gas pedal.

What happens to an object in motion when no net force acts on it?

• The object comes to a stop immediately.

• The object accelerates in the opposite direction.

• The object continues to move at a constant velocity.

• The object changes direction randomly.

Explain how seatbelts are an application of Newton's First Law.

• Seatbelts are an application of Newton's First Law as they restrain passengers, preventing them from continuing in motion when a vehicle stops suddenly.

• Seatbelts are used to increase the speed of a vehicle during a crash.

• Seatbelts allow passengers to move freely in a vehicle without any restrictions.

• Seatbelts are designed to enhance the comfort of passengers while driving.

What is the relationship between force and acceleration in Newton's Second Law?

• Force is inversely proportional to acceleration.

• Force is independent of acceleration.

• Force is directly proportional to acceleration (F = ma).

• Force and acceleration are unrelated quantities.