Physics Tutor in Santacruz West Mumbai

+91-9958461445

If you live in Santacruz West Mumbai, you already know that this area has a very premium, educated and active lifestyle. Many families here are connected with business, films, media, corporate jobs and professional careers. Students study in good schools, live in good residential societies, and get many facilities. But still, one common problem remains: Physics is not becoming strong.

Many students attend school, coaching, online lectures and YouTube videos, but when a real Physics question comes, the mind becomes blank. The reason is simple: Physics cannot be learned only by watching random videos or memorising formulas. Physics needs concept clarity, logic, diagrams, derivations, numerical practice and personal doubt solving.

That is why students in Santacruz West Mumbai should study Physics from Kumar Sir. Kumar Sir explains every topic from basics to advanced level for NEET, IIT JEE, CBSE, IB, IGCSE, Edexcel, A-Level and AP Physics.

Contact Kumar Sir: +91-9958461445
Email: kumarsirphysics@gmail.com
Website: Kumar Physics Classes

Physics Concepts Explained by Kumar Sir

Why does a passenger fall forward when a moving bus suddenly stops?

When a moving bus suddenly stops, the lower part of the passenger’s body stops with the bus because it is in contact with the bus floor. But the upper part of the body continues to move forward due to inertia of motion. That is why the passenger falls forward.

Why is it difficult to walk on a frictionless surface?

Walking is possible because friction provides grip between our feet and the ground. When we push the ground backward, friction pushes us forward. On a frictionless surface, there is no grip, so we cannot push properly and walking becomes difficult.

Why does a gun recoil after firing a bullet?

When a bullet moves forward with high momentum, the gun moves backward to conserve momentum. This backward motion of the gun is called recoil. It is based on the law of conservation of momentum.

Why is Newton’s first law also called the law of inertia?

Newton’s first law says that a body remains at rest or in uniform motion unless an external force acts on it. This property of resisting change in state is called inertia. Therefore, Newton’s first law is also called the law of inertia.

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Final Message

If you are living in Santacruz West Mumbai and Physics is becoming difficult, do not waste time. Take proper guidance from Kumar Sir. Physics becomes easy when concepts are explained properly.

Call / WhatsApp: +91-9958461445
Email: kumarsirphysics@gmail.com
Website: Kumar Physics Classes

50 Conceptual Physics Questions with Answers

Mumbai Style Marble Look | Newton’s Laws | Inertia | Friction | Motion

1. Why does a passenger fall forward when a moving bus suddenly stops?

Because the lower body stops with the bus, but the upper body continues moving forward due to inertia of motion.

2. Why does a passenger fall backward when a bus suddenly starts?

The feet move with the bus, but the upper body tends to remain at rest due to inertia, so the passenger falls backward.

3. Why is it difficult to walk on a frictionless surface?

Walking needs friction. We push the ground backward and friction pushes us forward. Without friction, there is no grip.

4. Why does a gun recoil after firing a bullet?

The bullet moves forward with momentum, so the gun moves backward to conserve total momentum.

5. Why is Newton’s first law called the law of inertia?

Because it describes the tendency of a body to resist any change in its state of rest or uniform motion.

6. Why do we jerk forward when a car suddenly brakes?

Our body was moving with the car and tends to continue moving forward due to inertia.

7. Why do dust particles come out when a carpet is beaten?

The carpet moves suddenly, but dust particles remain at rest due to inertia and get separated.

8. Why does a coin fall into a glass when the card below it is flicked?

The card moves away quickly, but the coin remains nearly at rest due to inertia and falls vertically into the glass.

9. Why should passengers wear seat belts?

Seat belts prevent the body from moving forward suddenly during braking or collision.

10. Why does a heavy body have more inertia?

Inertia depends on mass. Greater mass means greater resistance to change in motion.

11. Why does a football stop after rolling on the ground?

Friction between the football and ground opposes motion and gradually stops it.

12. Why does a bicycle stop when we stop pedalling?

Friction and air resistance oppose its motion, so its speed decreases.

13. Why do tyres have grooves?

Grooves increase friction and provide better grip on the road, especially on wet surfaces.

14. Why is oil used in machines?

Oil reduces friction between moving parts and prevents wear and heating.

15. Why is friction sometimes useful?

Friction helps us walk, write, drive vehicles and hold objects.

16. Why is friction sometimes harmful?

It causes wear, heat production and energy loss in machines.

17. Why does a swimmer push water backward?

By Newton’s third law, water pushes the swimmer forward with equal and opposite force.

18. Why does a rocket move upward?

Hot gases are pushed downward, and the reaction force pushes the rocket upward.

19. Why do we feel a jerk when a lift starts upward?

The lift accelerates upward, increasing the normal reaction on our body.

20. Why do we feel lighter when a lift moves downward with acceleration?

The normal reaction decreases, so apparent weight becomes less.

21. Why does a body remain at rest unless force acts on it?

Due to inertia of rest, a body does not change its state without external force.

22. Why does a moving body continue moving in absence of force?

Due to inertia of motion, it continues in uniform motion unless an external force acts.

23. Why is force required to change velocity?

Force produces acceleration, and acceleration changes velocity.

24. Why is force a vector quantity?

Force has both magnitude and direction.

25. Why does a cricket player pull hands backward while catching a ball?

This increases stopping time and reduces impact force.

26. Why are vehicles provided with shock absorbers?

Shock absorbers increase time of impact and reduce sudden force.

27. Why does a karate player break a tile with a fast blow?

A fast blow produces large force in a very short time.

28. Why does a soft mattress reduce injury?

It increases stopping time, reducing the force on the body.

29. Why is action and reaction not cancelled?

They act on different bodies, so they do not cancel each other.

30. Why can we walk forward?

We push the ground backward, and the ground pushes us forward due to friction.

31. Why does a boat move backward when a person jumps forward?

Momentum is conserved; person moves forward and boat moves backward.

32. Why is it easier to pull than push a lawn roller?

Pulling reduces normal reaction and friction, while pushing increases them.

33. Why does a person slip on banana peel?

Banana peel reduces friction between foot and ground.

34. Why is sand thrown on slippery roads?

Sand increases friction and provides better grip.

35. Why do athletes use spiked shoes?

Spikes increase friction with the ground and prevent slipping.

36. Why does a fast moving ball hurt more?

It has greater momentum and produces greater impact force.

37. Why does a loaded truck take longer to stop?

It has more mass and momentum, so more force or time is needed to stop it.

38. Why does a lighter body accelerate more for the same force?

According to F = ma, acceleration is inversely proportional to mass.

39. Why is it difficult to push a heavy box?

Heavy box has more inertia and more friction due to greater normal reaction.

40. Why does a ball bounce back from a wall?

The wall exerts an equal and opposite reaction force on the ball.

41. Why do we lean forward while running?

Leaning forward helps maintain balance and produce forward acceleration.

42. Why does a person fall sideways when a bus takes a sharp turn?

The body tends to move in the original straight direction due to inertia.

43. Why does mud fly off a rotating tyre?

Mud moves tangentially due to inertia when it loses contact with the tyre.

44. Why is circular motion accelerated motion?

Even if speed is constant, direction of velocity changes continuously, so acceleration exists.

45. Why does a stone tied to a string move in a circle?

Tension provides centripetal force toward the centre.

46. Why does the stone fly tangentially when string breaks?

After the string breaks, centripetal force disappears and the stone moves along tangent due to inertia.

47. Why is banking of roads done?

Banking provides necessary centripetal force for safe turning of vehicles.

48. Why do passengers move outward on a turning bus?

Their body tends to continue in a straight line due to inertia.

49. Why is momentum conserved in absence of external force?

If external force is zero, total momentum of the system remains constant.

50. Why does Kumar Sir focus on concepts before numericals?

Because Physics numericals become easy only when the student understands force, inertia, friction, acceleration, momentum and diagrams clearly.

Simple Concept Diagram:
Force → Acceleration → Change in Motion
Inertia → Resistance to Change
Friction → Grip + Opposition to Motion
Momentum → Mass × Velocity

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