Science 8: Force, Motion, and Energy

What is the main purpose of Newton's Laws of Motion?

• To explain the behavior of objects in movements

• To describe the properties of matter

• To understand the concept of energy

• To study the behavior of living organisms

Which of these correctly lists Newton's three laws of motion?

• Law of Inertia, Law of Friction, Law of Gravity

• Law of Inertia, Law of Acceleration, Law of Action and Reaction

• Law of Motion, Law of Thermodynamics, Law of Electromagnetism

• Law of Inertia, Law of Action and Reaction, Law of Energy Conservation

What's the simplest way to explain Newton's First Law of Motion?

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

• The force of gravity pulls objects towards the center of the Earth.

• The force acting on an object is equal to its mass times acceleration.

• An object at rest will remain at rest unless acted upon by an external force.

In physics, how do we define acceleration?

• The force exerted on an object due to gravity

• The rate at which an object changes its position

• The resistance of an object to change its motion

• The rate at which an object changes its velocity

How does Newton's Second Law of Motion describe the relationship between force, mass, and acceleration?

• Force is inversely proportional to mass and acceleration

• Force is directly proportional to mass and acceleration

• Force is directly proportional to mass and inversely proportional to acceleration

• Force is directly proportional to acceleration and inversely proportional to mass

Which of these is NOT a correct way to write Newton's Second Law of Motion?

• a = Fnet/m

• Fnet = ma

• a = Fnet (m)

• m = F/a

In physics, what term describes the combination of force and distance?

• Energy

• Power

• Motion

• Work

Which physics term refers to the rate at which work is done?

• Energy

• Power

• Work

• None of the above

What do scientists call the ability to do work?

• Energy

• Power

• Work

• None of the above

What unit do we use to measure work in physics?

• Decibel

• Joules

• Newtons

• Watts