Department of Mathematics and Science FORCE & MOTION

Department of Mathematics and Science

FORCE & MOTION


Topic 7: Forces and Changes in Motion

Benchmarks• SC.5.P.13.1 Identify familiar forces that cause objects to move, such as pushes or pulls, including gravity acting on falling objects.

• SC.5.P.13.2 Investigate and describe that the greater the force applied to it, the greater the change in motion of a given object.

• SC.5.P.13.3 Investigate and describe that the more mass an object has, the less effect a given force will have on the object's motion.

• SC.5.P.13.4 Investigate and explain that when a force is applied to an object but it does not move, it is because another opposing force is being applied by something in the environment so that the forces are balanced.

• SC.5.N.2.1 Recognize and explain that science is grounded in empirical observations that are testable; explanation must always be linked with evidence.

• LACC.5.SL.1.1 Engage effectively in a range of collaborative discussions (one-on-one, in groups, and teacher-led) with diverse partners on grade 5 topics and texts, building on others’ ideas and expressing their own clearly.


What is MOTION?

• A change in the position of an object.• Sometimes it may involve a change in direc

tion, too.


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What changes motion?

• Motion of an object changes when a force acts upon the object.

• An object remains in motion, or at rest, unless a force acts on it.

Object in motion

http://glencoe.mcgraw-hill.com/sites/dl/free/0078600472/161752/00035803.html

http://studyjams.scholastic.com/studyjams/jams/science/forces-and-motion/force-and-motion.htm


Unit 7 Lesson 1 What Are Forces?

Pushing and Pulling

Copyright © Houghton Mifflin Harcourt Publishing Company

• A force is a push or pull.

• Forces can change the movement of an object.

• Forces can change the shape of an object.



Pushing and Pulling


• Weight is a measure of the force gravity exerts on an object.

• Spring scales are used to measure force in units called newtons (N).


What conditions can affect force and motion?

• Amount of mass• Type of force applied• Type of surface texture• Surface area

Moon

Earth

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I’m Not Moving!


• If the same force is applied, objects with greater mass accelerate slower than objects with less mass.

• How can the steel ball be made to go higher?



I’m Not Moving!


• The larger the force applied to an object, the greater the acceleration is.

• The less an object’s mass is, the less force is needed to change its motion.



I’m Not Moving!


• Why does it take the full truck longer to stop than the empty truck?


What are forces?A push or a pull

GravityFriction

Air Resistance

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Department of Mathematics and Science FORCE & MOTION