Rest and Motion - UNSOLVED PRACTICE SET
Chapter: Motion | Topic: Rest and Motion
REST AND MOTION - UNSOLVED PRACTICE SET
Topic: Rest and Motion
Multiple Choice Question (MCQ)
Q1. You are sitting inside a moving train and watching the trees outside the window. Which of the following statements is correct?
- You are at rest, trees are in motion
- You are in motion, trees are at rest
- Both you and the trees are in motion
- Both you and the trees are at rest
Q2. Riya is standing at the bus stop. Her friend Priya drives past in a car. According to Priya, Riya is ________.
- At rest
- Moving backwards
- Moving forward
- Stationary and in the reference frame
Q3. Which of the following is the best example of an object that is simultaneously at rest and in motion?
- A ball lying on the ground
- A passenger sitting in a moving Delhi Metro train
- A kite flying in still air
- A book placed on a table in a moving bus, as seen by someone on the bus
Q4. The concept that rest and motion are not absolute but depend on the observer is called:
- Newton's First Law
- The Principle of Relativity of Motion
- Inertia of Rest
- Uniform motion
Q5. A coconut hangs on a tree. With respect to the ground, it is:
- In motion
- At rest
- In uniform motion
- Cannot be determined
Q6. If the position of an object does not change with time with respect to a reference point, the object is said to be:
- Moving
- Accelerating
- At rest
- Oscillating
Short Answer Questions
Q7. Define 'rest' and 'motion' in scientific terms. How are they different from each other?
Q8. Explain with a simple example why rest and motion are said to be 'relative'. Use a real-life scene from daily life in your answer.
Q9. What is a 'reference point'? Why is it important to mention a reference point when describing the motion of an object?
Q10. Your school peon rings the bell and stands at the gate. Is he at rest or in motion? Can both answers be correct? Explain.
Q11. Suppose you are watching a cricket match on TV and you see a fielder running. With respect to what reference point is the fielder in motion? Would the fielder be in motion with respect to another fielder running at the same speed in the same direction? Justify your answer.
Q12. Can an object be at rest with respect to one observer and in motion with respect to another observer at the same time? Give one example to support your answer.
Long Answer Questions
Q13. Rahul is sitting in a bus that is moving at a constant speed on a straight highway. His mother is standing on the road watching the bus pass.
(a) Is Rahul in motion or at rest according to his mother?
(b) Is Rahul in motion or at rest according to himself?
(c) Is the seat next to Rahul in motion or at rest according to Rahul?
(d) What conclusion can you draw about the nature of rest and motion from this situation? Explain in detail.
Q14. Imagine you are standing on a railway platform and two trains are on adjacent tracks. Train A moves forward slowly, while Train B is still. Suddenly, it feels as if Train B is moving backward.
(a) What is actually happening?
(b) Explain the concept of relative motion using this example.
(c) Why do our senses sometimes mislead us about who is moving?
(d) What role does a 'reference frame' play in determining motion?
Q15. Earth is revolving around the Sun, and the Sun is also moving through the galaxy.
(a) Are we ever truly 'at rest' in the universe? Discuss.
(b) From the perspective of someone standing on the Moon, are people on Earth at rest or in motion?
(c) Why do we consider objects on Earth as 'at rest' in our daily life even though Earth is moving?
(d) What does this tell us about the importance of choosing a suitable reference frame?
Numerical / Application-Based Problems
Q16. Arun walks from his home to school. He covers 600 m towards the East, then turns and walks 200 m towards the West.
(a) What is the total distance covered by Arun?
(b) What is his final displacement from home?
(c) If it took him 10 minutes to complete the journey, state whether he was in motion or at rest during this time. Give reason.
Q17. A bird is sitting on the roof of a moving car. The car is travelling at a constant speed of 60 km/h.
(a) Is the bird at rest or in motion with respect to the driver of the car?
(b) Is the bird at rest or in motion with respect to a person watching from the roadside?
(c) The driver claims the bird is at rest. The roadside observer says the bird is moving. Who is correct? Explain.
Q18. An object starts at position A and moves to position B, which is 80 m to the right. It then moves back from B to a point C, which is 30 m to the left of A.
(a) Draw a simple number line showing positions A, B, and C.
(b) Calculate the total distance travelled.
(c) Calculate the displacement of the object from its initial position (A).
(d) Is the object at rest or in motion at the end? What additional information would you need to confirm your answer?