Forces Types of Forces Effects of Forces Gravity
- Slides: 23
Forces Types of Forces Effects of Forces Gravity, Mass and Weight Newton’s Laws Freefall
What is force? Common symbol: F Unit: Newton, N Equivalent base units: kg-m-s-2
Mass versus Weight l Mass ¡ Amount of matter in an object ¡ unit: kilogram, kg ¡ Does not change with location l Weight ¡ Gravitational force on the object ¡ Unit: Newton, N ¡ Equal to l Mass x acceleration due to gravity lm x g l Where g = 9. 81 ms-2 ¡ Changes with location
Newton’s Third Law For every action there is an equal and opposite reaction Law of Action and Reaction
Weight Normal force Weight Air resistance
Weight Drag Friction Thrust Normal Force
Weight Drag Thrust Upthrust
Effects of Forces l Change shape ¡Rigid bodies l Change the state of motion ¡Move from rest ¡Speed up ¡Slow down ¡Stop ¡Change its direction l Newton’s Laws
Change of Shape
extension
Newton’s First Law If no unbalanced force acts on a body then the body is in equilibrium. Law of Inertia
When the forces are balanced l The body does not move l The body moves ¡At a constant speed ¡In the same direction
Balanced forces
Balanced Forces The book stays still!
Balanced Forces The airplane moves forwards at constant speed!
Balanced Forces Drag Thrust Friction The car moves at constant speed!
Newton’s Second Law l An unbalanced force changes the motion of an object. ¡ It speeds up ¡ Or slows down ¡ Or changes direction ¡ Or changes speed and direction l Acceleration ¡ change in motion l Equation ¡a = force mass
Unbalanced Forces The car moves from rest. The car speeds up.
Unbalanced Forces The car slows down to stop. The car slows down.
The Physics of Falling l Freefall ¡Motion where only gravity is acting on the body ¡Acceleration due to gravity, g ¡Air resistance is negligible
The Physics of Skydiving
The Physics of Falling with Air Resistance l Terminal Velocity ¡The maximum speed of a falling object ¡When upward forces balance downward forces on the object
The End
- Gravity for dummies and dummies for gravity equations
- How is gravity and electromagnetic forces alike
- Mind map of types of forces
- What is like parallel forces
- The forces shown above are pushing/pulling forces
- Intermolecular vs intramolecular
- Inter vs intramolecular
- Covalent bond intermolecular forces
- Contact and noncontact forces
- Unbalanced force
- What are constructive and destructive forces
- 3 types of intermolecular forces
- Concept of imfa
- Van der waals attraction
- Divided into two types
- Free body diagram egg drop
- Why intermolecular forces are weaker than intramolecular
- Different forces in technology
- Force and motion webquest
- Terminal velocity igcse
- Newton's 3rd law of motion
- Types of forces
- Types de forces physique
- Solid