Net force is the combined result of all forces acting on an object.

What is a free-body diagram?

A free-body diagram is used to show the direction and amount of forces acting on an object.

What is normal force?

Normal force is the force exerted by a surface on an object resting on that surface.

Momentum is the amount of movement of an object, considering its velocity and mass.

How do you calculate net force when two forces act in opposite directions?

You subtract the forces to find the net force.

How do you calculate net force when two forces act in the same direction?

You add the forces to find the net force.

Elasticity is the property where a material returns to its original shape after being stretched or compressed.

What is elastic force?

Elastic force is the force exerted in the opposite direction to a stretch or compression.

What is gravitational force?

Gravitational force pulls objects with mass toward each other.

How does gravity change with distance?

Gravity gets weaker with distance.

What does gravity pull on?

Gravity pulls on mass, not weight.

Weight is the amount that gravity pulls on a mass.

What is the acceleration of gravity?

All objects fall at the same speed due to gravity unless acted upon by air pressure (9.8 m/s² or about 22 mph).

What is terminal velocity?

Terminal velocity is the maximum acceleration achieved due to gravity, balancing gravity’s pull and air resistance due to speed.

What is the terminal velocity for humans?

Around 120 mph, 53.6 m/s², or a little over 5 seconds of free fall.

Friction is a force that opposes motion between any surfaces that are touching.

Are surfaces perfectly smooth?

No, no surface is perfectly smooth.

How does surface roughness affect friction?

The rougher the surfaces, the more friction between them.

Why do heavy objects have more friction?

Heavy objects press together with greater force, increasing friction.

What does friction produce?

Friction produces heat because it causes molecules on rubbing surfaces to move faster and have more energy.

What are the types of friction?

The types of friction are rolling, sliding, fluid, and static.

Physics Concepts and Forces Flashcards

Student preview

28 questions

Show all answers

1.

FLASHCARD QUESTION

Front

What is inertia?

Back

Inertia is the resistance of matter to changes in motion.

2.

FLASHCARD QUESTION

Front

What determines if an object is moving or not moving?

Back

It depends on its surroundings.

3.

FLASHCARD QUESTION

Front

What is force?

Back

Force is a push or a pull.

4.

FLASHCARD QUESTION

Front

What is an unbalanced force?

Back

An unbalanced force causes changes in motion or rest.

5.

FLASHCARD QUESTION

Front

What is mass?

Back

Mass is the amount of matter in an object.

6.

FLASHCARD QUESTION

Front

What is acceleration?

Back

Acceleration is the change in motion or direction.

7.

FLASHCARD QUESTION

Front

What is the speed necessary to escape Earth’s gravity?

Back

25,023 mph.

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