Newtons Laws

32 flashcards · Physics · by Logan Pollack

1. Force

   vector quantity measured in Newtons [N]

2. Net Force

   vector sum of all forces

3. Newtons 1st Law

   an object with no net force (equilibrium) acting on it will: remain at rest continue moving with a constant velocity

4. When a net force is equal to zero the object is at equilibrium

5. Indirect relationship between mass and acceleration

6. If a force is pointing left or down it is negative

7. Newtons 2nd Law

   Direct Relationship Between: mass and force force and acceleration

8. Field Forces

   Forces exerted without contact EX: Pull of the Earth on the Moon

9. What is the acceleration

   2 m/ss down

10. What is the net force?

    10 N down

11. What is the net force?

    5 N right

12. How is the block above moving? accelerating to the right accelerating to the left moving with a constant velocity to the right moving with a constant velocity to the left

    2. accelerating to the left

13. Inertia

    an objects resistance to change

14. Law of Inertia

    Inertia is proportional to and dependent only on mass Greater mass = greater inertia

15. Contact Forces

    Exists when two objects are touching each other EX: Pushing a book across a table

16. Newtons 3rd Law

    For every action there is an equal and opposite reaction

17. How is the block above moving? accelerating to the right accelerating to the left moving with a constant velocity to the right moving with a constant velocity to the left

    accelerating to the right

18. Static Equilibrium

    at rest

19. Dynamic Equilibrium

    constant velocity

20. Unbalanced forces produce acceleration

21. Mass

    A measure of how much matter is in an object Scaler Unit [kg]

22. Weight can also be described as the force due to gravity

23. Weight

    The effect of gravitational pull on a mass Same as gravitational force; Fg Vector (always down, always negative) Unit [N] (Newtons)

24. What is the significance of the slope of a Gravitational Force vs. Mass graph?

    Slope = acceleration due to gravity

25. Gravitational Field Strength

    Another term for acceleration due to gravity is gravitational field strength It is expressed as N/kg On Earth, gravitational field strength is 9.8 N/kg

26. Near the surface of the Earth:

    Mass is constant Acceleration due to gravity, g, is -9.81 m/s2

27. Since Fg, weight, is massx acceleration due to gravity, your weight, will never change (never change or change?)

28. Standing Still / Constant Velocity

    FN = Fg Scale Reading equal to your weight

29. In Elevator Problems the Fg is:

    actual weight

30. In Elevator Problems the FN is:

    what the scale reads

31. Accelerating Upward

    FN > Fg Scale reading greater than your weight

32. Accelerating Downward

    FN < Fg Scale reading is less than your weight