Chapter 12 Review - Forces and Motion

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Covers the following: - All forces - Gravity - Inertia And more...

What is the SI unit of force?

The Newton

What is the net force that results when a pair of balanced forces acts on an object?

Zero

When an unbalanced force acts on an object, the object _____.

accelerates

What kind of friction occurs as a fish swims through water?

Fluid friction

As you push a cereal box across a tabletop, the sliding friction acting on the cereal box acts in the ______ direction.

Opposite

What forces are acting on a falling leaf?

Gravity - air resistance

An open parachute increases air resistance by increasing the _____ _____.

surface area

The property of matter that resists changes in motion is called ______.

Inertia

An orange might roll off your cafeteria tray when you stop suddenly because of the orange's _____.

Inertia

According to Newton's second law of motion, the acceleration of an object equals the net force acting on the object divided by the object's _____.

Inertia

If a force of 10 N is applied to an object with a mass of 2 kg, the object will accelerate at _____.

5 m/s squared

Newton's third law of motion describes _____ and _____ forces.

Action; Reaction

The product of an object's mass and velocity is its ______.

Momentum

What is the momentum of a 25 kg ice skater gliding across the ice at a speed of 5 m/s?

125 kg times m/s squared

The farther an astronaut travels away from Earth, her weight ______.

Decreases

The gravitational force between two objects increases as mass ______.

Increases

A push or pull is an example of _____.

Force

The type of force measured by a grocery store spring scale is _____.

Weight, due to gravity.

The sum of all the forces acting on an object is called the _____.

Net force.

If the forces acting on an object produce a net force of zero, the forces are called _____.

Balanced forces

The force that opposes the motion of objects that touch as they move past each other is called ______.

Friction

The two forces acting on a falling object are gravity and ______.

Air resistance

The tendency of an object to resist any change in its motion is called _____.

Inertia

The acceleration of an object is equal to the net _____ acting on the object divided by the object's _____.

Force, Inertia

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