Force and Motion

Fingers and hands pulling, pushing, pressing, or lifting are all examples of applying

• Friction

• Gravity

• Motion

• Force

A ball is at rest at the top of a hill until a boy kicks it with his foot. What is the force that causes motion in this scenario?

• The resting ball

• The hill

• The boy's foot

• The moving ball

As the ball rolls down the hill, it begins to move faster. What other force besides the initial force is causing the ball to roll faster down the hill?

• Gravity

• Friction

• The hill

• The ball

As the ball reaches flat ground, it begins to slow down and then stop. What force causes the ball to appear as if it has stopped on its own?

• Gravity

• The boy's foot

• The hill

• Friction

Newton's First Law of Motion explains that...

• An object will stay at rest unless acted on by a force

• acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object

• that for every action (force) in nature there is an equal and opposite reaction.

Newton's Second Law of Motion describes...

• An object at rest will stay at rest unless acted upon by a force

• that for every action (force) in nature there is an equal and opposite reaction.

• The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object.

Newton's Third Law of Motion is...

• The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object.

• for every action (force) in nature there is an equal and opposite reaction.

• An object will remain at rest unless acted on by a force

Motion is

• A force applied to an object by a person or another object

• The force by which a planet or other body draws objects toward its center

• Change in the position of an object over time.

Applied force is

• A force in the opposite direction of the motion

• The force by which a planet or other body draws objects toward its center.

• A force applied to an object by a person or another object.

Gravity is

• A force in the opposite direction of the motion.

• The force by which a planet or other body draws objects toward its center

• : Change in the position of an object over time