Motion (9 Science)
Motion is the change of position of an object with respect to time, and understanding its laws is fundamental to physics. This chapter covers distance, dis
TL;DR: Motion is the change of position of an object with respect to time, and understanding its laws is fundamental to physics. This chapter covers distance…
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Motion is the change of position of an object with respect to time, and understanding its laws is fundamental to physics. This chapter covers distance, dis
Motion MCQs with Answers & Explanations
Q1. Which of the following is a scalar quantity?
- Velocity
- Displacement
- Speed ✓ (correct)
- Acceleration
Q2. The slope of a distance-time graph represents:
- Acceleration
- Speed ✓ (correct)
- Displacement
- Distance
Q3. If a car travels 100 m east and then 50 m west, its displacement is:
- 150 m west
- 150 m east
- 50 m east ✓ (correct)
- 50 m west
Q4. Acceleration is the rate of change of:
- Distance
- Displacement
- Velocity ✓ (correct)
- Speed
Q5. If an object moves with constant velocity, its acceleration is:
- Positive
- Negative
- Zero ✓ (correct)
- Infinite
Q6. Newton's first law of motion states that:
- F = ma
- An object in motion stays in motion unless acted upon by a force ✓ (correct)
- Action and reaction are equal
- Objects fall with constant acceleration
Q7. Newton's second law can be expressed as:
- a = F/m
- v = u + at
- F = ma ✓ (correct)
- s = ut + 1/2 at^2
Q8. An object is said to be in uniform motion when it:
- Travels equal distances in equal times ✓ (correct)
- Has constant acceleration
- Travels in a circle
- Is at rest
Q9. The SI unit of acceleration is:
- m/s
- m/s^2 ✓ (correct)
- km/h
- cm/s^2
Q10. If an object starts from rest and accelerates at 2 m/s^2 for 5 seconds, its final velocity is:
- 2 m/s
- 5 m/s
- 10 m/s ✓ (correct)
- 25 m/s
Frequently Asked Questions
What is the difference between speed and velocity?
Speed is a scalar quantity (magnitude only) representing rate of motion, while velocity is a vector (magnitude and direction).
How do Newton's laws of motion apply to daily life?
Newton's laws explain phenomena like why we move forward when a car brakes suddenly (law 1) and why heavier objects need more force to move (law 2).
More 9 Science MCQs
- Light Reflection and Refraction
- Electricity
- Acids Bases and Salts
- Life Processes
- Carbon and its Compounds
- Metals and Non-metals
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