Quiz #2: Newton's Laws of Motion

What does Newton's First Law of Motion state?

• An object in motion will stay in motion unless acted upon by an external force.

• An object in motion will eventually come to a stop without any force.
• An object will change direction only if a force is applied.
• An object at rest will remain at rest unless acted upon by an external force.

According to Newton's second law of motion, how is force calculated?

• Force is calculated as

  F = m x a.

• Force is calculated as

  F = m / a.

• Force is calculated as

  F = m + a.

• Force is calculated as

  F = a / m.

What is Newton's third law of motion?

• An object in motion stays in motion unless acted upon by a force.
• For every action, there is an equal and opposite reaction.
• For every force, there is a corresponding force in the same direction.
• For every action, there is a proportional reaction.

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According to Newton's Third Law, the forces exerted by two colliding objects on each other are?

• Equal in magnitude and opposite in direction.
• Unequal in magnitude and in the same direction.
• Equal in magnitude and in the same direction.
• Unequal in magnitude and opposite in direction.

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Which of the following are examples of Newton's 3rd law of motion.

• a rocket launching

• a swimmer pushing off the pool wall

• a person jumping off a boat

• a driver stopped by a seatbelt

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What property of an object does Newton's First Law of Motion describe?

• Momentum
• Inertia
• Force
• Acceleration

Newton's 1st Law of Motion is also known as the Law of _________.

• Momentum
• Inertia
• Force
• Acceleration

What is inertia, as it applies to motion?

• Inertia is the energy an object possesses when it is at rest.
• Inertia is the speed of an object in motion.
• Inertia is the force that causes an object to move faster.
• Inertia is the resistance of an object to change its motion.

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NGSS.MS-PS2-2

What happens to an object if the force applied to it increases while its mass remains the same?

• The object's acceleration increases.
• The object's speed decreases.
• The object remains stationary.
• The object's mass decreases.

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What happens to an object if the force applied to it stays the same while its mass increases?

• The object's acceleration decreases.
• The object moves in the opposite direction.
• The object remains at rest.
• The object's speed increases.

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