Home
Class 9
PHYSICS
Take a metre scale and a long rope. Wa...

Take a metre scale and a long rope.
Walk from one corner A of a basketball court to its opposite corner Calong its sides AB and AC.
Measure the distance covered by you and magnitude of the displacement.
What difference would you notice between the two in this case ?

Text Solution

Verified by Experts


`to` The distance covered = A to B and B to C = AB + BC
Displacement = A to C = AC Here, AC `lt` AB + BC Hence, the displacement is less than the distance covered.
Promotional Banner

Topper's Solved these Questions

  • MOTION

    KUMAR PRAKASHAN|Exercise THINK AND ACT |2 Videos

  • MOTION

    KUMAR PRAKASHAN|Exercise INTEXT QUESTIONS AND ANSWERS |40 Videos

  • MOTION

    KUMAR PRAKASHAN|Exercise FILL IN THE BLANKS |50 Videos

  • GRAVITATION

    KUMAR PRAKASHAN|Exercise ACTIVITY 10.4|2 Videos

  • QUESTION PAPER 01

    KUMAR PRAKASHAN|Exercise SECTION - D|5 Videos

Similar Questions

Explore conceptually related problems

A room has dimensions 3 m xx 4 m xx5 m. A fly starting at one cronet ends up at the diametrically opposite corner. (a) What is the magnitude of its displacement ? (a) What is the magnitude of its displacement ? (b) If the fly wer to walk, what is the length of the shortest pothe it cantake ?

One hard and stormy night you find yourself lost in the forest when you come upon a small hut. Entering it you see a crooked old woman in the corner hunched over a crystal ball. You are about to make a hasty exit when you hear the howl of wolves outside. Taking another look at the gyspy you decide to take your chances with the wolves, but the door is jammed shut. Resigned to a bad situation you approach her slowly, wondering just what is the focal length of that nifty crystal ball. If the crystal ball is 20 cm in diameter with R.I = 1.5 , the gypsy lady is 1.2m from the ball , where is the image of the gypsy in focus as you walk towards her?

When a particle is undergoing motion, the diplacement of the particle has a magnitude that is equal to or smaller than the total distance travelled by the particle. In many cases the displacement of the particle may actually be zero, while the distance travelled by it is non-zero. Both these quantities, however depend on the frame of reference in which motion of the particle is being observed. Consider a particle which is projected in the earth's gravitational field, close to its surface, with a speed of 100sqrt(2) m//s , at an angle of 45^(@) with the horizontal in the eastward direction. Ignore air resistance and assume that the acceleration due to gravity is 10 m//s^(2) . The motion of the particle is observed in two different frames: one in the ground frame (A) and another frame (B), in which the horizontal component of the displacement is always zero. Two observers locates in these frames ill agree on :-

A pole has to be erected at a point on the boundary of a circular park of diameter 13 metres in such a way that the differences of its distances from two diametrically opposite fixed gates A and B on the boundary is 7 metres. Is it possible to do so? If yes, at what distances from the two gates should the pole be erected?

A pole has to be erected at a point on the boundary of a circular park of diameter 13 metres in such a way that the differences of its distances from two diametrically opposite fixed gates A and B on the boundary is 7 metres. Is it possible to do so ? If yes, at what distances from the two gates should the pole be erected?

A rectangular farm house has a 1km difference between its sides. Two farmers simultaneously leave one of the vertex of the rectangle for a point at the opposite vertex. One farmer crosses the farmhouse along its diagonal and other walks along the edge. The speed of each farmer is 4km//hr . If one of them arrives half an hour earlier then the other then the size of farmhouse is .

Represent the following situations in the form of quadratic eqautions : (1) The area of a rectangular plot is 528 m^(2) . The length of the plot (in metres) is one more than twice its breadth. We need to find the length and breadth of the plot. (2) The product of two consecutive positive integers is 306. We need to find the integers. (3) Rohan's mother is 26 years older than him. The product of their ages (in years) 3 years from now will be 360. We would like to find Rohan's present age. (4) A train travels a distance of 480 km at a uniform speed. If the speed had been 8km/h less, it would have taken 3 hours more to cover the same distance. We need to find the speed of the train.

Five charges, q each are placed at the corners of a regular pentagon of side 'a' as in figure: (a) (i) What will be the electric field at O, the centre of the pentagon ? (ii) What will be the electric field at O if the charge from one of the corners (say A) is removed ? (iii) What will be the electric field at O if the charge q at A is replaced by -q ? (b) How would your answer to (a) be affected if pentagon is replaced by n-sided regular polygon with charge q at each of its corners ?

It is a common observation that rain clouds can be at about a kilometer altitude above the ground. (a) If a rain drop falls from such a height freely under gravity, what will be its speed? Also calculate in km/h (g = 10 m//s^(2) ). (b) A typical rain drop is about 4 mm diameter. Momentum is mass x speed in magnitude. Estimate its momentum when it hits ground. (c) Estimate the time required to flatten the drop. (d) Rate of change of momentum is force. Estimate how much force such a drop would exert on you. (e) Estimate the order of magnitude force on umbrella. Typical lateral separation between two rain drops is 5 cm. (Assume that umbrella is circular and has a diameter of 1 m and cloth is not pierced through.)

When an object moves through a fluid, as when a ball falls through air or a glass sphere falls through water te fluid exerts a viscous foce F on the object this force tends to slow the object for a small sphere of radius r moving is given by stoke's law, F_(w)=6pietarv . in this formula eta in the coefficient of viscosity of the fluid which is the proportionality constant that determines how much tangential force is required to move a fluid layer at a constant speed v, when the layer has an area A and is located a perpendicular distance z from and immobile surface. the magnitude of the force is given by F=etaAv//z . For a viscous fluid to move from location 2 to location 1 along 2 must exceed that at location 1, poiseuilles's law given the volumes flow rate Q that results from such a pressure difference P_(2)-P_(1) . The flow rate of expressed by the formula Q=(piR^(4)(P_(2)-P_(1)))/(8etaL) poiseuille's law remains valid as long as the fluid flow is laminar. For a sfficiently high speed however the flow becomes turbulent flow is laminar as long as the reynolds number is less than approximately 2000. This number is given by the formula R_(e)=(2overline(v)rhoR)/(eta) In which overline(v) is the average speed rho is the density eta is the coefficient of viscosity of the fluid and R is the radius of the pipe. Take the density of water to be rho=1000kg//m^(3) Q. If the sphere in previous question has mass of 1xx10^(-5)kg what is its terminal velocity when falling through water? (eta=1xx10^(-3)Pa-s)

KUMAR PRAKASHAN-MOTION -ACTIVITY
  1. Discuss whether the walls of your classroom are at rest or in motion.

    Text Solution

    |

  2. Have you ever experienced that the train in which you are sitting appe...

    Text Solution

    |

  3. Take a metre scale and a long rope. Walk from one corner A of a bask...

    Text Solution

    |

  4. Automobiles are fitted with a device that shows the distance travelled...

    Text Solution

    |

  5. The data regarding the motion of two different objects A and B are giv...

    Text Solution

    |

  6. Measure the time it takes you to walk from your house to your bus stop...

    Text Solution

    |

  7. At a time when it is cloudy. there may be frequent thunder and lightni...

    Text Solution

    |

  8. Measure this time interval using a digital wrist watch or a stopwatch....

    Text Solution

    |

  9. In your everyday life you come across a range of motions in which (a...

    Text Solution

    |

  10. The time of arrival and departure of a train at three stations A, B an...

    Text Solution

    |

  11. Feroz and his sister Sania go to school on their bicycle. Both of them...

    Text Solution

    |

  12. Take a piece of thread and tie a small place of stone at one of its en...

    Text Solution

    |

  13. If n capacitors are connected in series then what is the equivalent ca...

    Text Solution

    |

  14. If n capacitance are connected in parallel and all are equal then find...

    Text Solution

    |

  15. Take a metre scale and a long rope. Walk from one corner A of a bask...

    Text Solution

    |

  16. If n equal resistance are first connected in series then find the equ...

    Text Solution

    |

  17. The data regarding the motion of two different objects A and B are giv...

    Text Solution

    |

  18. Measure the time it takes you to walk from your house to your bus stop...

    Text Solution

    |

  19. If n equal resistance are connected in parallel then find the equival...

    Text Solution

    |

  20. Measure this time interval using a digital wrist watch or a stopwatch....

    Text Solution

    |