University:
Bradley University
Course:
PHY 100 | Fundamental Physics Concepts
Academic year:

2024
Views:

28

Pages:

11
Author:

Angelica Rose

FORCE • A push or pull. • If an object pushes/pulls another object, it exerts a force on that object. • Force causes objects to move, stop, & change direction. FORCE DESCRIPTION • Described by its strength & the direction in which it acts. SI UNIT FOR FORCE • Newton (N) • Measures the strength of the force • One Newton = force of lifting one lemon. ARROWS IN FORCE • Direction & strength of a force can be shown using arrows. • Arrow points in direction of the force. • Length of arrow = strength of force. Longer = stronger force NET FORCE • All forces that act on an object. • Determines whether an object moves & in what direction it moves. • Always moves in direction of the greater force. NET FORCE EXAMPLE 18 Newtons. 20 Howtau • Not Foroe 2 Newtons - CALCULATING NET FORCE • Forces go in same direction (ADD) 5> 9> • Forces go in opposite direction (Subtract) 12> 5< • Forces may also cancel each other out. 3> 3< UNBALANCED FORCES • Occurs when a net force act on an object. • These forces can make object start moving, stop moving, or change its direction. • Unbalanced forces cause a change in the object’s motion. UNBALANCED Examples • Boy and girl forces a box to move that way. • Boy and girl forces are opposite of one another, net force goes in boy’s direction. w i r • Equal forces acting on an object in opposite directions. • These forces do NOT change object’s motion.