Newton's Laws and the Rubber Band Car

What does Newton's First Law of Motion state?

• An object will eventually stop moving on its own.

• An object at rest tends at rest, unless acted upon by an unbalanced force.

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

• The acceleration of an object depends on its mass and the force applied.

Answer explanation

Newton's First Law of Motion states that an object at rest tends to stay at rest, unless acted upon by an unbalanced force.

Which of the following best illustrates Newton's First Law?

• • A car speeding up.

• • A ball rolling down a hill.

• • A book sitting on a table.

• • A plane preparing to land.

Answer explanation

Newton's First Law states that an object at rest will remain at rest unless acted upon by an external force. Therefore, a book sitting on a table best illustrates this law as it remains stationary until a force is applied.

• According to Newton's Second Law, what happens if you apply the same force to two objects of different masses?

• • They both accelerate equally.

• • The object with more mass accelerates more.

• • Neither object accelerates.

• • The object with less mass accelerates more.

Answer explanation

According to Newton's Second Law, the object with less mass accelerates more when the same force is applied to two objects of different masses.

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Which of the following is an example of Newton's Third Law?

• • A swimmer pushing off the wall of a pool.

• • A car slowing down to a stop.

• • A helium balloon rising into the air.

• Gravity pushing an object towards Earth

Answer explanation

A swimmer pushing off the wall of a pool is an example of Newton's Third Law because for every action (swimmer pushing), there is an equal and opposite reaction (swimmer moving forward).

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Which law explains why a passenger moves forward in their seat when a car suddenly stops?

• • Newton's First Law

• • Newton's Second Law

• • Newton's Third Law

• • Newton's Law of Universal Gravitation

Answer explanation

Newton's First Law states that an object in motion stays in motion unless acted upon by an external force. When a car suddenly stops, the passenger continues moving forward due to inertia.

What is inertia?

• • The force that moves objects.

• • The resistance of any physical object to any change in its state of motion.

• • The acceleration of an object.

• • The energy needed to move an object.

Answer explanation

The resistance of any physical object to any change in its state of motion.

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When a rubber band car is at rest, which of Newton's laws explains why it stays at rest?

• • Newton's First Law

• • Newton's Second Law

• • Newton's Third Law

• • None of these

Answer explanation

When a rubber band car is at rest, it stays at rest due to Newton's First Law.

What provides the force to move a rubber band car?

• • Gravity

• Stored energy in twisted rubber band

• • Friction

• • Air resistance

Answer explanation

Stored energy in twisted rubber band provides the force to move a rubber band car.

If you increase the number of twists in the rubber band, what happens to the car's acceleration according to Newton's Second Law?

• • It decreases.

• • It stays the same.

• • It increases.

• • It stops moving.

Answer explanation

If you increase the number of twists in the rubber band, the potential energy stored in the band increases. As a result, when the rubber band is released, it exerts a greater force on the car, leading to an increase in acceleration according to Newton's Second Law.

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How does the mass of the car affect its acceleration if the force is constant at 50 turns?

• • More mass means more acceleration.

• • More mass means less acceleration.

• • Mass does not affect acceleration.

• • Less mass means less acceleration.

Answer explanation

More mass means less acceleration because the acceleration is inversely proportional to the mass when the force is constant.

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