Force: Fundamental Concepts

Question 1

Which of the following best describes what a force is in physics?

Accepted Answer

A push or a pull acting on an object

Answer

The amount of energy an object contains

Answer

The speed at which an object is moving

Answer

A measure of an object's mass

Question 2

What is the standard international (SI) unit for measuring force?

Accepted Answer

Newton

Answer

Joule

Answer

Watt

Answer

Pascal

Question 3

An object will accelerate (change its velocity) if the forces acting on it are:

Accepted Answer

Unbalanced

Answer

Balanced

Answer

Equal and opposite

Answer

Applied simultaneously from all directions

Question 4

Which of these is a common effect of applying a force to an object?

Accepted Answer

Changing its velocity

Answer

Increasing its temperature

Answer

Changing its color

Answer

Reducing its volume

Question 5

According to a fundamental principle of forces, for every action, there is an equal and opposite reaction. This describes which concept?

Accepted Answer

Action-reaction pair

Answer

Inertia

Answer

Friction

Answer

Gravity

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