1. Forces and Motion Miss Pratt’s Fifth Grade Class

2. Forces and Motion Forces A force is a push or pull on an object. Forces cause objects to move or to stop moving. There are many kinds of forces. The motion of any object can be understood by looking at all of the forces that are acting on that object. Motion The motion of an object can be described by its position and how that position changes over time. If an object is moving slowly, its position will also change slowly 4.01 Determine the motion of an object by following and measuring its position over time. The learner will conduct investigations and use appropriate technologies to build an understanding of forces and motion in technological designs.

3. Forces You apply forces to objects every day. You walk by pushing your feet against the ground as you move forward. Your muscles also move parts of your body by applying forces. 4.05 Determine factors that affect motion including: Force Friction. Inertia. Momentum

4. Energy Force requires energy. Energy is the capacity to do work. It can be used to move muscles, operate machines, cook meals, and heat rooms. Gravity is the force that pulls all objects on earth toward the center of Earth. 4.03 Explain how energy is needed to make machines move.

5. Forces and Motion Balanced forces Forces that have a net force of zero Unbalanced forces Forces that have a net force that is not zero 4.04 Determine that an unbalanced force is needed to move an object or change its direction.

6. Motion and Inertia Inertia The tendency of an object to remain at rest or in motion unless it is acted on by a force. Momentum The product of the mass and velocity of an object. Momentum is changed by how fast an object is moving and how much mass that object has. 05 Determine factors that affect motion including: Force Friction. Inertia. Momentum

7. Friction The force that acts on an object to stop its motion. Acts in the opposite direction of the direction in which the object is moving 05 Determine factors that affect motion including: Force Friction. Inertia. Momentum

8. Forces and Motion