Q21.A car is moving with speed of 150 km h-1 and after applying the brake it will move 27 m before it stops. If the same car is moving with a speed of one third the reported speed then it will stop after travelling _____ m distance.
What This Question Tests
This question applies the third equation of motion (v^2 = u^2 + 2as) to relate stopping distance to initial velocity, given constant deceleration. It tests the understanding that stopping distance is proportional to the square of initial velocity.
Concepts Tested
Formulas Used
v^2 = u^2 + 2as
📚 NCERT Sections This Tests
2.5 — Relative Velocity Within Its Local Group Of Galaxies.
Physics Class 11 · Chapter 2
2.5 Relative velocity within its local group of galaxies. Motion is change in position of an object with time. How Summary does the position change with time ? In this chapter, we shall Points to ponder learn how to describe motion. For this, we develop the Exercises concepts of velocity and acceleration. We shall confine ourselves to the study of motion of objects along a straight line, also known as rectilinear motion. For the case of rectilinear motion with uniform acceleration, a set of simple equations can be obtained. Finally, to understand the relative nature of motion, we introduce the concept of relative velocity. In our discussions, we shall treat the objects in motion as point objects. This approximation is valid so far as the size of the object is much smaller than the distance it moves in a reasonable duration of time. In a good number of situations in real-life, the size of objects can be neglected and they can be considered as point-like objects without much error. In Kinematics, we study ways to describe motion without going into the causes of motion. What causes motion described in this chapter and the next chapter forms the subject matter of Chapter 4. Reprint 2025-26 14 PHYSICS
11.10 — What Is The De Broglie Wavelength Of
Physics Class 12 · Chapter 11
11.10 What is the de Broglie wavelength of (a) a bullet of mass 0.040 kg travelling at the speed of 1.0 km/s, (b) a ball of mass 0.060 kg moving at a speed of 1.0 m/s, and (c) a dust particle of mass 1.0 × 10–9 kg drifting with a speed of 2.2 m/s ?
6.11 — Dynamics Of Rotational
Physics Class 11 · Chapter 6
6.11 Dynamics of rotational the motion of extended bodies. motion about a fixed axis A large class of problems with extended bodies can be
📋 Question Details
- Chapter
- Kinematics
- Topic
- Equations of motion
- Year
- 2022
- Shift
- 25 Jul Shift 1
- Q Number
- Q21
- Type
- Numerical
- NCERT Ref
- Class 11 Physics Ch 3: Motion in a Straight Line
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