Newton’s Laws of Motion

An object or a person can apply force to another object or person.

The direction of acceleration is the same as the direction of the deceleration.

Newton’s second law lets you predict what combination of ______ and _________ you need to get the acceleration you need.

Forces are measured in a unit called power (P).

Newton summarized his findings in two laws of motion.

The tendency of an object to resist a change in motion is called inertia.

Newton’s first law of motion states that if the net force acting on an object is zero, the motion of the object does not change.

When the forces acting on an object are balanced, the object is either accelerating or decelerating with a constant velocity.

Unbalanced forces will not cause an object to accelerate or decelerate.

Unbalanced forces will not cause an object to change direction.

Newton’s second law of motion states that velocity is the speed and direction of an object’s motion.

The direction of acceleration is the same as the direction of the net force.

Newton’s third law of motion says that when one object exerts a force on a second object, the second object exerts a force of the same size, but in the opposite direction, on the first object.

When two objects apply forces on each other, one of the forces is called the action force, and the other is called the reaction force.

When two objects exert forces on each other, the two forces are balanced forces.

Balanced forces combine or cancel each other out because they act on the same object. Each force in a force pair acts on a different object.

When the forces applied to an object act in the same direction, the net force is the subtraction of the individual forces.

The net force is the sum of the positive forces only.

If you apply a force of 1.5 N to a ball with a mass of 0.3kg. What is the ball's acceleration?

If you apply a force of 1.5 N to a ball with a mass of 0.6 kg. What is the ball's acceleration?