Forces and Motion

creating a vacuum in front of the boat

pushing against the water

using a propeller to push air backwards

using sails to catch the wind

According to Newton's third law of motion, 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.

According to Newton's first law of motion, an object at rest stays at rest unless acted upon by an external force.

According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

According to the law of universal gravitation, every point mass attracts every other point mass with a force along the line intersecting both points.

perpendicular

parallel

diagonal

tangential

An elastic collision occurs

An inelastic collision occurs

No collision occurs

A static collision occurs.

inelastic.

elastic.

perfectly elastic.

explosive.

The law of mass and acceleration

The law of action reaction

The law of inertia

A high five with your friend hurts.

A ball bouncing

It takes more energy to thrown a basketball than a volleyball.

It's harder to push Mr. Beckham than Ms. Alvarez on a swing

A bike rolling down a hill.