Question

At the beginning of a unit on forces, Ms. Alton is leading a class discussion asking her students

what they know about forces. Below is a list of the ideas brought up by her class.

I. A force is a push or pull on an object.
II. The amount of force an object has depends on its size.
III. Forces have both a strength and direction.
IV. When two objects collide, the force of one object is transferred to the second object.
V. A moving object stops when its force is used up.
VI. There are no forces on an object that is not moving.
Which of these student responses would you consider to be correct?
For each that is incorrect, what is incorrect about it?

Answer 1

(iv), (v), (vi) would be incorrect.

Step-by-step explanation:

(iv) Force isn't transferred from one colliding object to another, but momentum can be.

(v) An object doesn't stop immediately a force stops acting on it. Think of a thrown ball.

(vi) For an object not to move, it means that the net force on the object is zero, and not necessarily that there are no forces acting on the object. For example, an object could be pushed on one side, and be pushed on the other side with an equal force in the opposite direction. The forces would cancel each other and the net force would be zero.

The rest should be correct.