What is force ?
Force is a push or pull on an object that can make it move, stop, change direction, or change shape.
Features of Force .
Force has both magnitude and direction .The magnitude of the force is how much, and the direction is in which way the force is moving . Force is measured in Newtons. Newtons tell how strong is the force .
Draw the first picture of the two men pulls the rope insert the arrows and Newton.
Types of force : 1. Gravity 2. Air resistance 3. Push force 4. Pull force 5. Contact force 6. Non contact force 7. Friction 8. Balanced force 9. Uptrust
What is gravity ? Gravity is what pulls everything to the earths surface . It makes everything fall to Earth when it goes up. It is represented by a downward arrow .
What is air resistance?
Air resistance describes the forces that are in opposition to the relative motion of an object as it passes through the air. Example someone jumps with a parachute. As he falls gravity will pull him to the ground and air resistance will push him up. We will also find that as a airplane fly it is push back by air resistance.
What is push force ?
Push force also called applied force is a force that is applied to an object by another object. If you push a box across the floor, your force pushing on the box is the applied force.
Push force uses a forward arrow.
What is pull force ?
Pull force is the action of pull an object towards oneself it is identify by a back arrow.
What is balanced force ?
A balanced force is when two or more forces acting on an object are equal in size but opposite in direction, so they cancel each other out. This means there is no change in the object’s motion.
What is uptrust or Buoyancy force?
Upthrust is a force that pushes things up in water or other liquids. It is also called buoyant force. It let things float in water .If the object is heavier than the upthrust, it sinks
