QCM : Fundamentals of Force and Motion — 2 questions

Questions et réponses du QCM

1. What best describes a force acting on an object?

A push or pull that can change an object's behavior
A property that measures how much space an object takes up
The state of being at rest with no motion
The rate at which an object's position changes

A push or pull that can change an object's behavior

Explication

A force is a push or pull, and it can change motion, direction, speed, or shape. The other options describe motion, rest, or an unrelated property.

2. Which statement best describes an object at rest?

It stays in the same position relative to its surroundings
It must have no forces acting on it
Its position changes relative to its surroundings
It is moving with constant speed in a straight line

It stays in the same position relative to its surroundings

Explication

Rest means no motion, so the object's position does not change relative to its surroundings. An object can still have forces acting on it even if it is at rest, as long as they are balanced.

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Force — definition?

Push or pull applied to an object.

Push effect — role?

Drives an object away from the point.

Rest — motion state?

Object stays in the same position.

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