Force powerpoint

Forces Power Point

1. Chapter 2: The Laws of Motion

2. What do you think? Agree or Disagree?

3. A push or pull on an object. Described by: A force gives an object energy to: Force STRENGTH DIRECTION STOP MOVING START MOVING CHANGE DIRECTION

4. The SI unit for force is the The symbol for Newton is One Newton = about the force you exert to lift a lime. Named after: Strength and Direction of Forces NEWTON N Sir Isaac Newton (founder of physics)

5. Contact Force Non Contact Force Types of Force

6. A push or pull on one object by another that is touching it. Contact Force Contact forces can be: Strong OR Weak Example: FRICTION = force that opposes motion between two surfaces in contact.

7. A force that one object can apply to another object without touching it. Noncontact Force Examples Include: Gravity- universal attraction between all objects. Magnetism- attracts and repels objects

8. An attractive force that exists between all objects that have mass. Weight is a measure of the force of gravity acting upon an object. Gravity Force of gravity On EARTH the force of gravity = 9.8 m/s 2 All objects fall to the Earth at an acceleration of 9.8m/s 2 due to the force of gravity.

9. The amount of matter in an object. Mass Which object has more mass?

10. Weight and mass are related, but ARE NOT the same. Weight can due to Mass change Weight and Mass on Earth CHANGE GRAVITY DOES NOT

11. can be used to show forces. The of an arrow shows the of the force. The that the arrow points shows the direction in which the The stronger the force the the arrow. Strength and Direction of Forces ARROWS DIRECTION LENGTH STRENGTH FORCE WAS APPLIED LONGER

12. The combination of all the forces acting on an object. To calculate the net force: If the forces act in the same direction they are added together. If forces act in opposite directions they are subtracted . DO THE MATH pg 191, #13. Do with shoulder partner. Net Force

13. Forces acting on an object that combine and form a net force of ZERO . NO change in motion. Combining Forces – Balanced Forces

14. Forces acting on an object that combine and form a net force that is not zero. Unbalanced forces cause an object to move. Forces moving in the same direction are Forces moving in the opposite direction are Combining Forces - Unbalanced ADDED SUBTRACTED

15. How is Force Calculated? FORCE= MASS x ACCELERATION F= ma Force measured in NEWTONS Mass measured in KILOGRAMS Acceleration measured in M/S 2 DO THE MATH pg 195….RACE!

16. Weight and mass are related, but ARE NOT the same. Weight can due to Mass change Weight and Mass on Earth CHANGE GRAVITY DOES NOT F = Weight on Earth = M x A MASS x 9.8m/s 2 (acceleration due to the force of gravity)