Тест: Fundamentals of Force and Motion — 2 въпроса

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

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

B. A property that measures how much space an object takes up

C. The state of being at rest with no motion

D. The rate at which an object's position changes

Answer: (A)

Обяснение

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?

A. It stays in the same position relative to its surroundings

B. It must have no forces acting on it

C. Its position changes relative to its surroundings

D. It is moving with constant speed in a straight line

Answer: (A)

Обяснение

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.