Motion in Systems Quiz

This is the rate at which an object changes its speed or direction

• Force

• Newton's 1st Law

• Net Force

• Acceleration

Answer explanation

Acceleration is defined as the rate at which an object changes its speed or direction. It quantifies how quickly velocity changes over time, making it the correct answer to the question.

Tags

NGSS.MS-PS2-2

The acceleration of an object depends on net force and mass of the object.

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

Answer explanation

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass, as stated in Newton's 2nd Law (F=ma). This law explains the relationship between force, mass, and acceleration.

Tags

NGSS.MS-PS2-2

This is calculated by multiplying mass by acceleration.

• Newton's 2nd Law

• Force

• Newton's 3rd Law

• Newton's 1st Law

Answer explanation

The statement describes how force is calculated, which is the product of mass and acceleration, as stated in Newton's 2nd Law. Therefore, the correct answer is 'Force', as it directly relates to this calculation.

Tags

NGSS.MS-PS2-2

For every action there is an equal and opposite reaction

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

Answer explanation

The statement "For every action there is an equal and opposite reaction" describes Newton's 3rd Law of Motion, which states that forces always occur in pairs. Thus, the correct answer is Newton's 3rd Law.

Tags

NGSS.MS-PS2-1

An object at rest tends to stay at rest unless acted on by an unbalanced force.

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

Answer explanation

The statement describes Newton's 1st Law, which states that an object at rest will remain at rest unless acted upon by an unbalanced force. This law emphasizes the concept of inertia.

This is a combination of all forces on an

• Velocity

• Net Force

• Mass

• Acceleration

Answer explanation

The net force is the vector sum of all forces acting on an object. It determines the object's acceleration according to Newton's second law. Therefore, the correct answer is 'Net Force'.

Tags

NGSS.MS-PS2-2

The pictures represent the effect of tension on Earth’s crust. Two students disagree on what the image shows. Here is what they said:

Jose: This shows a balanced force. The forces acting on the crust are equal in strength.

Joanna: There are no forces that act on Earth’s crust. Which student is correct?

• Jose

• Joanna

• both students

• neither student

Answer explanation

Jose is correct because the image likely shows tension forces acting on the Earth's crust, which can create a balanced state. Joanna's claim that no forces act on the crust is incorrect.

Tags

NGSS.MS-ESS2-2

What type of force causes these movements in the plates?

• balanced forces

• unbalanced forces

• inertia

• friction

Answer explanation

Unbalanced forces cause movements in tectonic plates by creating unequal pressure and stress, leading to shifts and collisions. Balanced forces would not result in movement, making unbalanced forces the correct choice.

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

30 mph west is an example of _____________.

• speed

• acceleration

• velocity

• friction

Answer explanation

30 mph west is an example of velocity because it includes both speed (30 mph) and direction (west). Unlike speed, which only measures how fast something is moving, velocity specifies the direction of that movement.

A lamp sitting on a table demonstrates which law?

• Newton’s first law

• Newton’s second law

• Newton’s third law

• None of the above laws

Answer explanation

A lamp on a table remains at rest unless acted upon by an external force, illustrating Newton's first law of inertia, which states that an object at rest stays at rest.