Question

select the correct statement(s). forces may be pushes or pulls. objects do not have to touch for a force to act. forces may cause objects to change speed or direction. forces can be strong or weak. objects must touch for a force to act.

Explanation:

1. A force is a push or pull upon an object resulting from the object's interaction with another object, so "Forces may be pushes or pulls" is correct.
2. Examples like gravitational and magnetic forces show objects don't have to touch for a force to act, making "Objects do not have to touch for a force to act" correct.
3. According to Newton's second - law, a force can change an object's velocity (speed or direction), so "Forces may cause objects to change speed or direction" is correct.
4. Forces have magnitudes and can be strong or weak, so "Forces can be strong or weak" is correct.
5. As mentioned above, objects don't have to touch for a force to act, so "Objects must touch for a force to act" is incorrect.

Answer:

Forces may be pushes or pulls.
Objects do not have to touch for a force to act.
Forces may cause objects to change speed or direction.
Forces can be strong or weak.