Chapter 3: Motion, Acceleration and Forces

Friction

Friction

________: the force that opposes the sliding motion of two surfaces that are touching each other.

Terminal Velocity

The ________ depends on the size, shape, and mass of a falling object.

Weight

________ is a force and mass is a measure of the amount of matter an object contains.

Newtons second law

According to ________, if the acceleration is zero, then the net force on the box is zero.

Moon

On the ________, the gravitational force on the astronaut is less than it is on Earth.

Earths Gravity

________ causes projectiles to follow a curved path.

Chemical interactions

________ between atoms and molecules also are due to the electromagnetic force.

Electricity

________ and magnetism are caused by the electromagnetic force.

Newtons Second Law of Motion

________ describes how the forces exerted on an object its mass, and its acceleration are related.

Gravity

________: an attractive force between any two objects that depends on the masses of the objects and the distance between them.

Newtons Third Law of Motion

________: describes action- reaction pairs this way: When one object exerts a force on a second object, the second one exerts a force on the first that is equal in strength and opposite in direction.

Momentum

________: the product of its mass and velocity.

Air Resistance

________: opposes the motion of objects that move through the air.

Gravitational Force

The weight of an object usually is the ________ between the object and Earth.

Static Friction

________: the frictional force that prevents two surfaces from sliding past each other.

Amount of Friction

The ________ between two surfaces depends on two factors- the kinds of surfaces and the force pressing the surfaces together.

Momentum

________ is transferred in collisions.

Friction

________ is due to microwelds formed between two surfaces.

Static Friction

the frictional force that prevents two surfaces from sliding past each other

Sliding Friction

the force that opposes the motion of two surfaces sliding past each other

Centripetal Acceleration

Acceleration toward the center of a curved or circular path

Centripetal Force

The net force exerted toward the center of a curved path

Momentum

the product of its mass and velocity