Using the State Curriculum: Science, Grade 5

Clarifications: Each clarification provides an explanation of an indicator/objective to help teachers better understand the skills and/or concepts.

Standard 5.0 Physics

Topic A. Mechanics

Indicator 2. Explain that the changes in the motion of objects are determined by the mass of an object and the amount (size) of the force applied to it.

Objective b. Observe and explain the changes in selected motion patterns using the relationship between force and mass.

Clarification
The greater of two forces applied to an object will result in a greater change in motion. The more massive an object, the greater the force required to change its position. For example, to push a large dictionary across a table required more force than to push a small notebook. When the forces are unbalanced they cause changes in the speed or direction of an object’s motion, such as, when a stationary soccer ball is kicked. The size of the force exerted by the foot, friction between the ball and the ground, gravity, and air resistance all act upon the ball and cause changes in its position and motion.
/instruction/clarification/science/grade5/xml/5A2b.xml

Clarification

The greater of two forces applied to an object will result in a greater change in motion. The more massive an object, the greater the force required to change its position. For example, to push a large dictionary across a table required more force than to push a small notebook. When the forces are unbalanced they cause changes in the speed or direction of an object’s motion, such as, when a stationary soccer ball is kicked. The size of the force exerted by the foot, friction between the ball and the ground, gravity, and air resistance all act upon the ball and cause changes in its position and motion.

/instruction/clarification/science/grade5/xml/5A2b.xml

Resources for Objective 5.A.2.b:
CLARIFICATIONS | Public Release Items |

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