Enjoy 😊
### Basic Concepts
1. **What does Newton's First Law of Motion state?**
A) Force equals mass times acceleration
B) Every action has an equal and opposite reaction
C) An object at rest stays at rest unless acted upon by an external force
D) Momentum is conserved in a closed system
2. **Which of the following quantities is a scalar?**
A) Force
B) Acceleration
C) Mass
D) Momentum
3. **Which of these units is used to measure force?**
A) Joule
B) Newton
C) Watt
D) Pascal
4. **The inertia of an object depends on:**
A) Its velocity
B) Its mass
C) Its acceleration
D) Its shape
5. **Acceleration is defined as:**
A) Change in position over time
B) Change in velocity over time
C) Force applied over time
D) Mass per unit volume
### Newton’s Laws
6. **Which of the following is an example of Newton’s Third Law?**
A) A ball rolling on the ground
B) A book resting on a table
C) A rocket launching
D) A car accelerating
7. **If a force of 10 N is applied to a mass of 2 kg, the acceleration produced is:**
A) 2 m/s²
B) 5 m/s²
C) 10 m/s²
D) 20 m/s²
8. **Which law explains why passengers move forward when a car stops suddenly?**
A) Newton’s First Law
B) Newton’s Second Law
C) Newton’s Third Law
D) Law of Conservation of Momentum
9. **An object’s acceleration is directly proportional to:**
A) Its mass
B) The applied force
C) Its velocity
D) Its position
10. **In the absence of an external force, a moving object will:**
A) Stop immediately
B) Continue to move at a constant velocity
C) Increase its velocity
D) Change direction
### Force and Motion
11. **The net force acting on an object moving at a constant velocity is:**
A) Greater than zero
B) Less than zero
C) Equal to zero
D) None of the above
12. **The frictional force always acts:**
A) In the direction of motion
B) Opposite to the direction of motion
C) Perpendicular to the motion
D) Randomly
13. **Which force is responsible for keeping an object in circular motion?**
A) Gravitational force
B) Centripetal force
C) Frictional force
D) Magnetic force
14. **A force that causes rotation is called:**
A) Tension
B) Torque
C) Centripetal force
D) Momentum
15. **What is the gravitational force on a 10 kg object on Earth?**
A) 10 N
B) 98 N
C) 100 N
D) 9.8 N
### Momentum and Impulse
16. **Momentum is defined as:**
A) Mass × Velocity
B) Mass × Acceleration
C) Force × Time
D) Force × Distance
17. **The unit of momentum is:**
A) kg·m/s
B) N·m
C) Joule
D) Watt
18. **The impulse experienced by an object is equal to:**
A) Its momentum
B) The change in its momentum
C) Its mass times acceleration
D) Its force times distance
19. **Which quantity is conserved in an isolated system?**
A) Force
B) Momentum
C) Acceleration
D) Velocity
20. **If a 5 kg ball moving at 2 m/s collides and sticks to a 3 kg ball at rest, what is the final velocity?**
A) 1.25 m/s
B) 2 m/s
C) 0.5 m/s
D) 3.5 m/s
### Work, Power, and Energy
21. **Work done is defined as:**
A) Force × Mass
B) Force × Displacement × cos(θ)
C) Mass × Velocity
D) Power × Time
22. **The unit of power is:**
A) Joule
B) Newton
C) Watt
D) Pascal
23. **Kinetic energy depends on:**
A) Mass and acceleration
B) Mass and velocity
C) Force and displacement
D) Mass and height
24. **What is the work done when a 10 N force moves an object 5 m in the direction of the force?**
A) 50 J
B) 2 J
C) 5 J
D) 100 J
25. **Potential energy is highest when:**
A) An object is moving
B) An object is at rest on the ground
C) An object is at its highest point
D) An object is accelerating
### Advanced Dynamics
26. **Which force acts towards the center in circular motion?**
A) Centripetal
B) Centrifugal
C) Friction
D) Tension
27. **What happens to the acceleration of an object if the net force doubles while the mass remains constant?**
A) It doubles
B) It halves
C) It remains the same
D) It quadruples
28. **The maximum static frictional force is called:**
A) Kinetic friction
B) Normal force
C) Limiting friction
D) Rolling friction
29. **In projectile motion, the horizontal component of velocity:**
A) Increases
B) Decreases
C) Remains constant
D) Becomes zero at the peak
30. **The work done by a centripetal force is:**
A) Positive
B) Negative
C) Zero
D) Maximum
31. **The acceleration due to gravity on Earth is approximately:**
A) 9.8 m/s²
B) 8.9 m/s²
C) 10 m/s²
D) 9.8 km/s²
32. **When an object falls freely under gravity, its motion is called:**
A) Uniform motion
B) Circular motion
C) Free fall
D) Projectile motion
33. **In which direction does the normal force act?**
A) Parallel to the surface
B) Perpendicular to the surface
C) Opposite to the gravitational force
D) Along the applied force
34. **Which of the following is not a type of friction?**
A) Static friction
B) Kinetic friction
C) Fluid friction
D) Magnetic friction
35. **Which factor does not affect the coefficient of friction between two surfaces?**
A) Surface roughness
B) Nature of materials
C) Mass of the object
D) Contact area
### Motion and Equilibrium
36. **An object in equilibrium has:**
A) Zero net force
B) Constant acceleration
C) Constant velocity
D) Zero inertia
37. **Which of these is a condition for translational equilibrium?**
A) Sum of torques is zero
B) Sum of external forces is zero
C) Object is in free fall
D) Object is moving in a circle
38. **The center of mass of a system:**
A) Always lies within the object
B) Can lie outside the object
C) Is the point where mass is least concentrated
D) Changes with velocity
39. **A pulley system is used to:**
A) Increase power
B) Change the direction of force
C) Reduce energy
D) Increase velocity
40. **Which of the following objects has the greatest inertia?**
A) A 10 kg mass at rest
B) A 5 kg mass moving at 10 m/s
C) A 2 kg mass at 20 m/s
D) A 1 kg mass accelerating at 50 m/s²
### Rotational Dynamics
41. **Torque is given by the formula:**
A) Force × Distance from axis of rotation
B) Mass × Velocity
C) Force × Acceleration
D) Momentum × Radius
42. **The moment of inertia depends on:**
A) Mass only
B) Distribution of mass and axis of rotation
C) Velocity of the object
D) Force applied
43. **Angular momentum is conserved when:**
A) No external torque acts on the system
B) Net force is zero
C) Velocity is constant
D) Momentum is zero
44. **What is the unit of angular velocity?**
A) rad/s
B) m/s²
C) N·m
D) kg·m/s
45. **Which of these motions involves rotational dynamics?**
A) Car moving in a straight line
B) A spinning top
C) A falling ball
D) A book sliding on a table
### Applications of Dynamics
46. **Which force keeps a satellite in orbit?**
A) Gravitational force
B) Electromagnetic force
C) Centrifugal force
D) Tension force
47. **What happens to the force if the distance between two masses is doubled?**
A) It doubles
B) It reduces to one-fourth
C) It remains the same
D) It halves
48. **Which principle explains the working of a rocket?**
A) Newton's First Law
B) Newton's Second Law
C) Newton's Third Law
D) Law of Gravitation
49. **Static friction is:**
A) Always less than kinetic friction
B) Equal to kinetic friction
C) Usually greater than kinetic friction
D) Not present on rough surfaces
50. **A car moving in a circular track at constant speed is undergoing:**
A) No acceleration
B) Linear acceleration
C) Centripetal acceleration
D) Constant velocity motions
0 Comments