How can you tell, based on observing an object, that there is a net force acting upon that object?

Net force is the sum of all forces acting on an object. The net force can be calculated using Newton's second law, which states that F = ma, where: F is the net force. m is the mass of the object.

Explanation:

accelerating

Explanation:

If  accelerating it has a net ( unbalanced) force acting on it .

  with zero net forces it will either remain at rest or continue moving (but not accelerate)

since you're a real machine, your ama is always less than your ima, because you can never totally eliminate friction.

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.