A greater force increases acceleration, a greater mass decreases acceleration.

For every action force there is an equal and opposite reaction force.

An object's resistance to a change in its motion.

This Greek philosopher and scientist used common sense to explain physics, stating that there were "natural motions" and "violent motions". His theory stated that heavier objects would be more affected by gravity.

This early scientist made many contributions to the study of forces, and is well-known for his Law of Falling; if air resistance is negligible, then any two objects that are dropped together will fall together, regardless of their masses, shapes, or materials.

An object that is subject to no external forces will maintain its motion: it will remain stationary or keep moving with the same constant velocity.

The acceleration caused by a force on a 30 kg mass would be ______________ than that same force on a 40 kg mass.

A 5.7 kg wooden crate experiences a net force of 6.1 N [W]. Determine the crate's acceleration.

What is the net force of this free body diagram?

What is the acceleration of the object in this picture?

The wind exerts a force of 452 N [N] on a sailboat, while the water exerts a force of 325 N [W] on the sailboat. Find the net force and direction of the sailboat's motion.

Three workers move a car by pulling on three ropes. The first worker exerts a force of 600 N [N], the second a force of 750 N [E], the third a force of 675 N [E30*S]. With what force and precise direction does the car move?

A car sitting at a stoplight has a mass of 1500 kg. If a 4200 kg truck rear-ends the car with a force of 2300 N, what will be the acceleration of the car?

What is the gravitational force between two identical 50,000 kg asteroids whose centers of mass are separated by 1000 m?