SCIENCE

Becky

5 Min Quiz

# The source of force might be which of the following?

Force can be produced via muscle effort, gravity and electricity. In physics, we might refer to force as "F."

# What refers to surfaces that move over one another?

Friction refers to the force applied when surfaces move against one another. Even liquids and gases experience friction.

# Who believed that all motion is due to the nature of an object?

Aristotle believed that all motion is due to the nature of an object. He also believed that an object's natural state was at rest.

# Weight as a force is due to what factor?

Weight as a force is due to gravity. Apparent weight is a bit different because an external force is applied.

# True or False? Things always move at the same speed.

This is false. Things don’t always move at the same speed.

# Who performed experiments by dropping objects from the Leaning Tower of Pisa?

Galileo performed experiments by dropping objects from the Leaning Tower of Pisa. He discovered that all objects fell at the same rate.

# The property of objects to resist changes in rest or motion is called what?

The property of objects to resist changes in rest or motion is called inertia. This is Newton's first law of motion.

# Heavier objects tend to have ____ inertia.

Heavier objects tend to have more inertia. In other words, heavier objects are harder to move.

# Something that produces a change in motion is called what?

Something that produces a change in motion is called force. A push or a pull can be a force.

# "The net work done on an object is equal to the change in the object’s kinetic energy" refers to what theorem?

"The net work done on an object is equal to the change in the object’s kinetic energy" refers to the Work-Energy Theorem. Kinetic energy is the energy of motion.

# In physics, a standard unit of force is called what?

In physics, a standard unit of force is called a Newton. It is represented by the letter "N."

# True or false? An object on which only one force is acting is in equilibrium.

This is false. Equilibrium involves two opposing forces that are balanced.

# Every mass attracts every other mass with a force refers to what Newtonian law?

Every mass attracts every other mass with a force refers to the universal law of gravity. Newton proposed this law.

# Linear motion is motion in a ________ line.

Linear motion is motion in a straight line. Linear means "in a line."

# Who did not believe that Earth was at the center of the solar system?

Copernicus was one of the first to believe that Earth was not the center of the universe. He posited that the sun was at the center.

# Constant speed is what?

Constant speed is steady. The speed does not change.

# Velocity is _____ in a given direction.

Velocity is speed in a given direction. Velocity can change even if speed is constant.

# Free fall is when an object falls under the influence of ________ alone.

Free fall is when an object falls under the influence of gravity alone. Nothing must impede the fall, like air resistance, in a free fall.

# Speed equals distance _______ by time.

Speed equals distance divided by time. Speed measures how fast an object is traveling.

# How much matter an object has is defined as what?

How much matter an object has is defined as mass. In physics, mass is also a measure of inertia.

# In outer space, there is no gravity, so everything has zero ______.

In outer space, there is no gravity so everything has zero weight. In physics, even objects that are weightless can have mass.

# The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass refers to which of Newton's laws of motion?

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass refers to Newton's second law of motion. Objects act in the direction of the force being applied.

# Which of Newton's laws is the “action-reaction” law?

Newton's third law is the “action-reaction” law. The law states that any force will encounter an opposing force.

# Mass times velocity equals what?

Mass times velocity equals momentum. Momentum is based on speed and mass.

# Impulse refers to the _____________ of a force.

Impulse refers to the effectiveness of a force. A child pushing a car would not be as effective as an adult pushing a car.

# In the example of a bat hitting a baseball, the bat is what type of force?

In the example of a bat hitting a baseball, the bat is an external force. The bat and the ball are separate, external, objects.

# Is momentum conserved or lost during a collision?

Momentum is conserved during a collision. The momentum of the objects may be redistributed, but it is still there.

# True or False? Energy can be created and destroyed.

This is false. Energy cannot be created or destroyed. It can, however, be transformed.

# What term is used to describe how fast work is done?

The term, power, is used to describe how fast work is done. In physics, work refers to the application of energy.

# Any force directed toward a fixed center is called what?

Any force directed toward a fixed center is called centripetal force. Centrifugal force is an outward force.

# What is it called when the net force on something is zero?

Equilibrium occurs when a net force on something is zero. This means that both sides are equal.

# What is a measure of how fast something moves?

Speed is a measure of how fast something moves. Speed is measured in units.

# Greater gravitational force is applied to objects that have more or less mass?

The more mass, the greater the gravitational pull. Gravitational pull is also greater when objects are closer.

# Who wrote the three Laws of Motion?

Isaac Newton wrote the three laws of motion. These laws laid the groundwork for modern physics.

# Ocean tides are the result of what force?

Ocean tides are the result of gravity. Specifically, they are the result of the gravitational pull of the moon on the Earth.

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The field of physics comes with its own unique set of knowledge. From vocabulary to laws, physics can be tough. Test how well you know physics with this energetic quiz.