Forces and Motion Flashcard

Front

What does Newton’s Third Law state about the forces between two colliding objects?

Back

The forces are equal in magnitude and opposite in direction.

Answer explanation

Newton's Third Law states that for every action, there is an equal and opposite reaction. This means that when two objects collide, the forces they exert on each other are equal in magnitude and opposite in direction.

Tags

NY.SCI.6-8.MS-PS2-1

Front

Which of the following best describes the net force acting on an object at rest?

Back

The net force is zero.

Answer explanation

An object at rest has no net force acting on it, meaning all forces are balanced. Therefore, the correct choice is that the net force is zero.

Tags

NY.SCI.6-8.MS-PS2-2

Front

Which factor does NOT affect the strength of a magnetic force?

Back

The color of the magnets

Answer explanation

The color of the magnets does not influence their magnetic strength. Factors like distance, material, and inherent strength directly affect the magnetic force, while color is purely aesthetic.

Tags

NY.SCI.6-8.MS-PS2-3

Front

What is the nature of gravitational interactions between two objects?

Back

Always attractive

Answer explanation

Gravitational interactions between two objects are always attractive. This means that any two masses will exert a force that pulls them toward each other, regardless of their distance apart.

Tags

NY.SCI.6-8.MS-PS2-4

Front

What is evidence that a magnetic field exists between two magnets even when they are not touching?

Back

The magnets move toward or away from each other.

Answer explanation

The movement of the magnets toward or away from each other indicates the presence of a magnetic field, demonstrating that magnetic forces act at a distance, even when the magnets are not in contact.

Tags

NY.SCI.6-8.MS-PS2-5

Front

According to Newton’s Third Law, what happens to the forces exerted when a soccer ball and a basketball collide?

Back

Each ball exerts an equal and opposite force on the other.

Answer explanation

According to Newton's Third Law, for every action, there is an equal and opposite reaction. Therefore, each ball exerts an equal and opposite force on the other during their collision.

Tags

NY.SCI.6-8.MS-PS2-1

Front

Back

Answer explanation

The net force is calculated by subtracting the opposing forces. Here, 10 N (right) - 5 N (left) = 5 N to the right. Thus, the net force on the box is 5 N to the right.

Tags

NY.SCI.6-8.MS-PS2-2

Front

What factor is being investigated when two magnets repel each other more strongly when they are closer together?

Back

Distance between the magnets

Answer explanation

The student notes that the repulsion between magnets increases as they get closer, indicating that the distance between the magnets is the key factor being investigated. Other options do not affect magnetic repulsion.

Tags

NY.SCI.6-8.MS-PS2-3

Front

If the mass of one object increases, what happens to the gravitational force between it and another object?

Back

The gravitational force increases.

Answer explanation

According to Newton's law of universal gravitation, the gravitational force between two objects increases as the mass of either object increases. Therefore, if one object's mass increases, the gravitational force between it and another object increases.

Tags

NY.SCI.6-8.MS-PS2-4

Front

A student places a paperclip near a magnet and observes that the paperclip moves toward the magnet without touching it. What does this demonstrate?

Back

A magnetic field exists between the magnet and the paperclip.

Answer explanation

The movement of the paperclip towards the magnet indicates that a magnetic field exists between them, causing the paperclip to be attracted to the magnet. This demonstrates the effect of magnetism.

Tags

NY.SCI.6-8.MS-PS2-5