Preview

Baisc of Kinetics

Test your basics of kinetics

1. 1

   What does kinetics study?

   • Motion only
   • Causes of motion
   • Shapes of objects
   • Temperature only
2. 2

   Which law directly relates force, mass, and acceleration?

   • Newton's first law
   • Newton's second law
   • Newton's third law
   • Hooke's law
3. 3

   What is the net force on a 5 kg object accelerating at 2 m/s²?

   • 2.5 N
   • 7 N
   • 10 N
   • 20 N
4. 4

   What happens to acceleration if net force doubles while mass stays constant?

   • It halves
   • It doubles
   • It becomes zero
   • It stays the same
5. 5

   What happens to acceleration if mass doubles while force stays constant?

   • It doubles
   • It halves
   • It becomes zero
   • It stays the same
6. 6

   What is the weight of a 10 kg mass near Earth?

   • 9.8 N
   • 49 N
   • 98 N
   • 980 N
7. 7

   What force acts perpendicular to a surface?

   • Gravity
   • Normal force
   • Friction
   • Drag
8. 8

   What is static friction?

   • Friction acting only after sliding
   • Friction preventing relative motion
   • Friction caused by gravity
   • Air resistance
9. 9

   What is kinetic friction?

   • Friction between sliding surfaces
   • Gravitational force
   • Electric force
   • Normal force
10. 10

    What is the usual direction of friction?

    • Along the motion
    • Opposite relative motion
    • Toward Earth's center
    • Upward
11. 11

    What is drag?

    • A force caused by fluid resistance
    • A type of mass
    • A gravitational potential
    • An electric charge
12. 12

    What is terminal velocity?

    • Maximum possible acceleration
    • Constant speed reached when forces balance
    • Velocity at launch
    • Zero velocity
13. 13

    What is Hooke's law?

    • F = ma
    • F = -kx
    • p = mv
    • W = mg
14. 14

    What does the negative sign in F = -kx indicate?

    • Mass is negative
    • Force opposes displacement
    • Spring has no energy
    • Acceleration is constant
15. 15

    What is the coefficient of friction used to calculate?

    • Gravitational potential
    • Normal force and friction relationship
    • Mass only
    • Velocity only
16. 16

    If μ = 0.2 and N = 100 N, what is kinetic friction?

    • 5 N
    • 10 N
    • 20 N
    • 50 N
17. 17

    What is an inertial frame?

    • A frame accelerating rapidly
    • A frame where Newton's laws apply without fictitious forces
    • A frame with zero mass
    • A rotating frame only
18. 18

    What is an action-reaction pair?

    • Two forces on the same object
    • Equal and opposite forces on different objects
    • Two gravitational forces only
    • Two friction forces only
19. 19

    What is the net force when two opposite forces of 30 N and 18 N act on an object?

    • 12 N in direction of 30 N
    • 12 N in direction of 18 N
    • 48 N
    • 0 N
20. 20

    What is equilibrium under constant velocity?

    • Net force is zero
    • Net force is maximum
    • Acceleration is maximum
    • Mass is zero
21. 21

    What is a free-body diagram?

    • A graph of temperature
    • A diagram showing forces acting on an object
    • A velocity-time graph
    • A circuit diagram
22. 22

    What force keeps a satellite in circular orbit?

    • Friction
    • Gravity
    • Normal force
    • Spring force
23. 23

    What happens to centripetal force if speed doubles at fixed radius?

    • It halves
    • It doubles
    • It becomes four times larger
    • It stays constant
24. 24

    What is the force required to accelerate a 2 kg object at 6 m/s²?

    • 3 N
    • 8 N
    • 12 N
    • 18 N