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Basics of Dynamics

Test you basics of dynamics - very import topic in physics.

1. 1

   What is the primary focus of dynamics?

   • Forces and their effects on motion
   • Only geometric shapes
   • Only temperature
   • Only chemical reactions
2. 2

   What is Newton's first law also called?

   • Law of acceleration
   • Law of inertia
   • Law of gravitation
   • Law of energy
3. 3

   What is inertia?

   • A force
   • A body's resistance to changes in motion
   • Acceleration due to gravity
   • Energy stored in a spring
4. 4

   Which quantity measures rotational inertia?

   • Mass
   • Moment of inertia
   • Force
   • Power
5. 5

   What is Newton's third law?

   • F = ma
   • Objects remain at rest
   • Every action has an equal and opposite reaction
   • Energy is conserved
6. 6

   What is angular velocity?

   • Change in angle per unit time
   • Change in mass per unit time
   • Force per distance
   • Energy per time
7. 7

   What is angular acceleration?

   • Change in angular velocity per unit time
   • Angular velocity divided by mass
   • Force times distance
   • Mass times velocity
8. 8

   What is torque?

   • The rotational equivalent of force
   • The rotational equivalent of mass
   • Linear momentum
   • Gravitational potential
9. 9

   What is the rotational form of Newton's second law?

   • τ = Iα
   • τ = mv
   • τ = ma
   • τ = I/v
10. 10

    What is angular momentum for a rigid body rotating about a fixed axis?

    • Iω
    • ma
    • Fd
    • mgh
11. 11

    When is angular momentum conserved?

    • When net external torque is zero
    • When force is maximum
    • When mass is zero
    • Only during collisions
12. 12

    What is the SI unit of angular momentum?

    • kg·m²/s
    • N
    • J
    • W
13. 13

    What is rotational kinetic energy?

    • Iω²
    • Iω
    • 1/2 Iω²
    • Iα²
14. 14

    What is rolling without slipping?

    • v = rω
    • v = r/ω
    • v = ω/r
    • v = r + ω
15. 15

    What does a larger moment of inertia generally mean?

    • Easier angular acceleration for the same torque
    • Greater resistance to angular acceleration
    • Zero torque
    • Zero mass
16. 16

    What is center of mass?

    • Point where all mass is considered concentrated for translational motion
    • The geometric center always
    • The heaviest point
    • The point with zero gravity
17. 17

    What is a stable equilibrium position?

    • A position where small displacement tends to restore the object
    • A position with maximum acceleration
    • A position with no mass
    • A position with infinite energy
18. 18

    What is a conservative force?

    • A force for which work is path-independent
    • A force that always increases speed
    • Only friction
    • Only drag
19. 19

    Which is a conservative force?

    • Kinetic friction
    • Air resistance
    • Gravity
    • Viscous drag
20. 20

    What does conservation of mechanical energy require?

    • Only friction
    • No nonconservative work changing mechanical energy
    • Zero mass
    • Constant temperature
21. 21

    What is the escape velocity from a spherical body related to?

    • Its mass and radius
    • Only its color
    • Only its temperature
    • Only its volume
22. 22

    What is the orbital speed of a circular orbit primarily determined by?

    • Central mass and orbital radius
    • Satellite color
    • Satellite temperature
    • Satellite volume
23. 23

    What is a damped oscillator?

    • An oscillator losing energy over time
    • An oscillator gaining infinite energy
    • A static object
    • A rigid body only
24. 24

    What is resonance?

    • A large response when driving frequency matches natural frequency
    • Zero acceleration
    • Loss of all energy
    • Random motion
25. 25

    What is simple harmonic motion characterized by?

    • Constant acceleration
    • A restoring force proportional to displacement
    • No restoring force
    • Infinite speed