Inertia - E: Inertia is the ability for an object to resist a change in its motion.
Mass - C: Mass is the total amount of matter in an object. Measured in grams (g.).
Gravity - B: Gravity is a force of attraction between objects.
Net Force - D: The net force is the total amount of force acting on an object.
Force - A: A force is a push or full on an object. Simply, an action that causes change.
The MORE mass an entity contains, the GREATER the inertia.
Feather - 1
Baseball - 2
Small Car - 3
Truck - 4
Train - 5
Top left question: The net force would be 30 Newtons to the left. Each dog pulls with a force of 6 Newtons. 6 (force) x 5 (dogs) = 30 Newtons to the left.
Top right question: Force = Mass x Acceleration. Force = 20 x 10. Force = 200 Newtons.
Left middle: 7 Newtons to the right. Subtract the 3 Newtons to the left from the higher value.
Right middle: 80 grams. Mass - Force/Acceleration. 40/0.5 = 80
Bottom Left: 8 N (right) - 4N (left) = 4N to the right (net force).
Bottom right: Force/Mass = Acceleration. 18/3 = 6 m/s^2