Answer: The direction of the force of friction is such that it opposes the direction of motion that an object would move if there were no frictional force acting on the object.
Answer:
The answer is the third option, the minimum force required to overcome static friction and move an object.
Explanation:
The first choice is talking about an object moving, and anything moving relates to <em>kinetic </em>friction, not static friction. I don't think it's the fourth option because, even with the net force being 0, the object could still be moving (again relating to kinetic friction).
Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement.
The child on a swing can be modeled as a simple pendulum. The period of a simple pendulum is given by
