Quizizz on Forces and Motion

What is force?

• A measurement of mass

• A push or pull one object exerts on another

• The resistance to motion

• The speed of an object

Tags

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How is force measured?

• In kilograms (kg)

• In meters per second (m/s)

• In Newtons (N)

• In joules (J)

What is net force?

• The force of gravity on an object

• The total sum of forces acting on an object

• The force of friction

• A type of balanced force

Tags

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Which of the following describes balanced forces?

• Forces that are unequal in size and act in the same direction

• Forces that are equal in size and opposite in direction

• Forces that cause motion

• Forces that always result in acceleration

What is friction?

• The pull of gravity

• Resistance to motion between two objects in contact

• The speed of an object in air

• The force that causes an object to fall

Which two factors affect friction?

• Speed and direction

• Mass and gravity

• Roughness of surface and amount of force

• Distance and angle

What is static friction?

• Friction between two moving surfaces

• The force between two surfaces that are not moving past each other

• A force that causes motion

• A type of gravitational force

What is kinetic friction?

• Friction that occurs when objects are at rest

• The resistance between moving surfaces

• Friction that decreases with speed

• The force that opposes static friction

How does gravity affect falling objects?

• It causes them to decelerate

• It pulls them upward

• It causes them to accelerate downward at 9.8 m/s²

• It has no effect on their motion

Tags

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According to the Law of Universal Gravitation, what happens as the distance between two masses decreases?

• The gravitational attraction decreases

• The gravitational attraction increases

• The masses will not affect each other

• The masses will repel each other