1. What is motion?
- Answer: Motion is the change in position of an object with respect to its surroundings in a given time.
2. How is motion different from rest?
- Answer: Rest is the absence of motion, while motion involves a change in position over time.
3. What is the SI unit of distance?
- Answer: The SI unit of distance is the meter (m).
4. Define speed.
- Answer: Speed is the rate at which an object covers distance. It is calculated as the distance traveled divided by the time taken.
5. Differentiate between speed and velocity.
- Answer: Speed is a scalar quantity that only considers the magnitude of motion, while velocity is a vector quantity that includes both magnitude and direction.
6. What is uniform motion?
- Answer: Uniform motion is when an object covers equal distances in equal intervals of time.
7. Explain non-uniform motion.
- Answer: Non-uniform motion occurs when an object covers unequal distances in equal intervals of time.
8. Define acceleration.
- Answer: Acceleration is the rate of change of velocity. It can be calculated as the change in velocity divided by the time taken.
9. How is acceleration different from deceleration?
- Answer: Acceleration is an increase in velocity, while deceleration (negative acceleration) is a decrease in velocity.
10. What is the SI unit of acceleration?
Answer: The SI unit of acceleration is meters per second squared (m/s²).
11. Explain circular motion.
Answer: Circular motion occurs when an object moves along a circular path. The object’s speed may be constant, but its direction changes continuously.
12. What is periodic motion?
Answer: Periodic motion is a type of motion that repeats itself at regular intervals.
13. Provide examples of periodic motion.
Answer: Examples include the motion of a pendulum, the Earth’s rotation, and the vibration of guitar strings.
14. Define oscillatory motion.
Answer: Oscillatory motion is a type of periodic motion characterized by a to-and-fro movement around a central position.
15. Differentiate between rectilinear and curvilinear motion.
Answer: Rectilinear motion occurs along a straight line, while curvilinear motion involves movement along a curved path.
16. What is projectile motion?
Answer: Projectile motion is the curved path that an object follows when thrown or projected into the air, subject only to the force of gravity and air resistance.
17. Explain the concept of relative motion.
Answer: Relative motion refers to the perception of motion of one object from the perspective of another moving or stationary observer.
18. What is rotational motion?
Answer: Rotational motion is the movement of an object around an axis, like the spinning of a wheel or the rotation of the Earth.
19. How is translational motion different from rotational motion?
Answer: Translational motion involves the movement of an object from one point to another, while rotational motion involves spinning or rotating around an axis.
20. Define vibratory motion.
Answer: Vibratory motion is a rapid to-and-fro movement of an object around a central position.
21. Explain simple harmonic motion.
Answer: Simple harmonic motion is a type of vibratory motion where an object oscillates back and forth about a central equilibrium position.
22. What is rectilinear motion with uniform acceleration?
Answer: Rectilinear motion with uniform acceleration is motion along a straight line with a constant rate of change of velocity.
23. How does friction affect motion?
Answer: Friction opposes the motion of objects and acts in the direction opposite to the motion.
24. What is the difference between static and kinetic friction?
Answer: Static friction prevents the initiation of motion, while kinetic friction opposes the motion of objects already in motion.
25. How can you determine the speed of an object from a distance-time graph?
Answer: The speed of an object can be determined by finding the slope of the distance-time graph. A steeper slope indicates higher speed.