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Science Unit 4

What factors affect acceleration of an object? Net force and mass
Describe an action/reaction situation. Swimming and a rowing boat
What does an unbalanced force do to the object it's active on? Makes it move
What does acceleration depend on? An object's mass
What does a Newton measure? Force
What are some ways to reduce friction? Lubricants like oil and soap Decrease the surface area of an object
Why do things eventually fall on the ground? Gravity
Describe friction. Contact force When two objects rub against one another, _____ opposes their motion
Describe intertia. The tendency of a moving object o keep moving in a straight line
Describe Netwon's laws. Explains how forces affect the motion of objects
Describe Newton's first law of motion. An object at rest tends to stay at rest unless acted upon by an unbalanced force
Describe Newton's second law of motion. Acceleration depends on an object's mass and the amount of net force applied to it
Describe Newton's third law of motion. When an object exerts a force on another, the second object exerts an equal force in the opposite direction
Define force. Any push or pull on any object
Examples of static, sliding, and rolling friction. Static - opposes the downward force of a book on a leaning desk, keeps the book in place Sliding - a big box slides when a force pushes on it Rolling - skates roll on the ground
Describe a balanced force acting on an object. In tug-of-war, if both groups apply equal forces, the forces are balanced
Created by: blakelyk