Force and motion review

1. Vocabulary and Formulae Force and motion review Created by Beverley Sutton Pueblo Gardens PreK-8

2. Everything in the universe is in motion. • Force is a push or pull that can result in a change in motion. • There are laws that explain the motion of an object. The three important understandings

3. the rate at which velocity changes (this means increases, decreases, or changes direction). Measured in meters per second per second and written as m/s2 acceleration

4. acceleration

5. negative acceleration; the rate at which velocity decreases deceleration

6. a force that causes an object to move in a circle. centripetal force

7. the ability of a physical system to do work.  energy

8. a push or a pull exerted on an object. force

9. Force = Mass X Acceleration Remember force is measured in Newtons, mass in kilograms and acceleration in m/s2 Force (N) = Mass (kg) × Acceleration (m/s2) force

10. -the force that one surface exerts on another when the two rub against each other. friction

11. the force that pulls all objects in the universe towards each other. gravity

12. the tendency of an object at rest to stay at rest; and the tendency of an object in motion to stay in motion (in a straight line).  inertia

13. a measure of the inertia of an object; the amount of matter in an object mass

14. any substance which has mass and occupies space.   matter

15. impetus; a vector; the property of a moving body given by its mass times its velocity (measured in kg.m/s). momentum

16. Momentum = Mass X Velocity Remember mass is measured in kilograms and velocity in m/s, so momentum is measured in kg.m/s momentum

17. the state in which one object's distance from another (the reference point) is changing. motion

18. the overall force on an object when all the individual forces are added together. net force

19. the unit measure of force Newton

20. a tangible and visible entity(something you can touch and see). object

21. a place or object used for comparison to determine if an object is in motion reference point

22. Distance travelled per unit time (speed = distance/time); the rate of change in the position of an object. Measured in meters per second (m/s). speed

23. speed Remember that velocity is calculated the same way, but velocity always includes a direction.

24. the rate and direction of the change in the position of an object. velocity

25. something measurable that changes Independent variable – variable we control Dependent variable – variable that changes as a DIRECT RESULT of what we do to the independent variable Variable

26. Terminal Velocity Since the net force on you is zero, your acceleration will also be zero (Newton's 1st Law). Now, you are no longer speeding up - you are moving at a constant velocity. This is called your terminal velocity. Unless something happens, this is the velocity that you will have until you hit the ground.

27. the force that gravity exerts upon a body. weight

28. Everything in the universe is in motion. • Force is a push or pull that can result in a change in motion. • There are laws that explain the motion of an object. So … remember …