Home
Class 11
PHYSICS
Let us consider an equation (1)/(2)mue...

Let us consider an equation
`(1)/(2)muepsilon^2 = mgh,`
Where m is the mass of the body, `upsilon` its velocity, g is acceleration due to gravity and h is the height. Check whether this equation is dimensionally correct.

Text Solution

Verified by Experts

`L.H.S. =(1)/(2)m upsilon^2 = M(LT^(-1))^2`
`= [M^1 L^2T^(-2)]`
`R.H.S. = mgh = M(LT^(-2))(L) = [M^1 L^2 T^(-2)]`
As L.H.S. = R.H.s., dimensionally,
The equation is dimensionally correct.
Promotional Banner

Topper's Solved these Questions

  • PHYSICAL WORLD AND MEASUREMENT

    PRADEEP|Exercise Conceptual Problem|65 Videos
  • PHYSICAL WORLD AND MEASUREMENT

    PRADEEP|Exercise NCERT Exercises|40 Videos
  • OSCILLATIONS AND WAVES

    PRADEEP|Exercise multiple choice Questions|13 Videos
  • PROPERTIES OF BULK MATTER

    PRADEEP|Exercise Multiple choice questions|7 Videos

Similar Questions

Explore conceptually related problems

Find ratio of acceleration due to gravity g at depth d and at height h where d=2h

The velocity of a freely falling body changes as g^ph^q where g is acceleration due to gravity and h is the height. The values of p and q are

The displacement of a body is given by s=(1)/(2)g t^(2) where g is acceleration due to gravity. The velocity of the body at any time t is

Assertion : In the equation, s=u+at-(1)/(2)a where, s is the distance travelled by uniformly accelerated body in tth second. Reason : The above equation is dimensionally incorrect.

Potential energy of a body depends on : (i) Mass of the body (m) . (ii) Acceleration due to gravity (g) . (iii) Height of the body with respect to ground (h).

A ball is thrown upwards . Its height varies with time as shown in figure. If the acceleration due to gravity is 7.5 m//s^(2) , then the height h is

Taking the value of the acceleration due toj gravity as 10 m s^(-2) , Find its value in km h^(-2).

Find the dimensions of K in the relation T = 2pi sqrt((KI^2g)/(mG)) where T is time period, I is length, m is mass, g is acceleration due to gravity and G is gravitational constant.

The Bernoulli's equation is given by P+1/2 rho v^(2)+h rho g=k . Where P= pressure, rho = density, v= speed, h=height of the liquid column, g= acceleration due to gravity and k is constant. The dimensional formula for k is same as that for:

If 'L' is length of simple pendulum and 'g' is acceleration due to gravity then the dimensional formula for (l/g)^(1/2) is same as that for

PRADEEP-PHYSICAL WORLD AND MEASUREMENT-Competiton Focus Jee Medical Entrance
  1. Let us consider an equation (1)/(2)muepsilon^2 = mgh, Where m is t...

    Text Solution

    |

  2. Assertion : Number of significant figure in 0.005 is one and that is 0...

    Text Solution

    |

  3. Assersion : Out of three meansurements l = 0.7 m, l = 0.70m and l = 0....

    Text Solution

    |

  4. Statement-1 : nm is not same as m N Statement -2 : 1 nm = 10^(-9) m ...

    Text Solution

    |

  5. Assertion: The dimensional formula of surface energy is [M^(0)L^(2)T^(...

    Text Solution

    |

  6. Statement -1 : Distance travelled in nth second has the dimensions of ...

    Text Solution

    |

  7. Statement-1 : Velocity gradient has the dimensions of frequency. Sta...

    Text Solution

    |

  8. Statement-1 If error in measurement of distance and time are 3% and 2%...

    Text Solution

    |

  9. Statement-1 : The dimensional formula of electric potential is [ML^2 T...

    Text Solution

    |

  10. Consider a Vernier callipers in which each 1cm on the main scale is di...

    Text Solution

    |

  11. The vernier constant of a vernier callipers is 0.1 mm and it has a pos...

    Text Solution

    |

  12. What is the use of thin strip at the back of vernier calliper ?

    Text Solution

    |

  13. When the two jaws of a vernier callipers are in touch, zero of vernier...

    Text Solution

    |

  14. The circular scale of a screw gauge has 200 divisions. When it is give...

    Text Solution

    |

  15. While measuring diameter of a wire using a screw gauge the main scale ...

    Text Solution

    |

  16. When a screw gauge is completely closed, zero of circular scale is 4 ...

    Text Solution

    |

  17. Two spherometers A and B have the same pitch. A has 100 division on pe...

    Text Solution

    |

  18. If h is the height or depth (sagitta) of a spherical surfacce and I is...

    Text Solution

    |

  19. A student measured the length of a rod and wrote it as 3.50 cm. Which ...

    Text Solution

    |