Home
Class 12
PHYSICS
If vecv=(4hati+3hatj+5k) m/s and m=(2)/(...

If `vecv=(4hati+3hatj+5k)` m/s and `m=(2)/(7)kg` then find kinetic energy `(i.e. (1)/(2)mv^(2))`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • RACE

    ALLEN |Exercise Basic Maths (Units, Dimensions & Measurements)|37 Videos

  • RACE

    ALLEN |Exercise Basic Maths (KINEMATICS)|63 Videos

  • RACE

    ALLEN |Exercise Basic Maths (Co-ordinate & Algebra)|40 Videos

  • NEWTONS LAWS OF MOTION

    ALLEN |Exercise EXERCISE-III|28 Videos

  • SIMPLE HARMONIC MOTION

    ALLEN |Exercise Example|1 Videos

Similar Questions

Explore conceptually related problems

If vecv=(4hati+5hatj+6k) m/s and m=(2)/(7)kg then find kinetic energy (i.e. (1)/(2)mv^(2))

If vecv=(3hati+2hatj+6k) m/s and m=(2)/(7)kg then find kinetic energy (i.e. (1)/(2)mv^(2))

If veca=2hati-hatj-5hatk and vecb=hati+hatj+2hatk , then find scalar and vector product.

Two bodies of masses m_(1) and m_(2) have same linear momentum . The ratio of their kinetic energies (E_(1))/(E_(2)) will be ………

A car having mass 1000 kg is moving with speed of 36kmh^(-1) . Calculate its momentum and kinetic energy. (Verify the value of kinetic energy using E_(k)=p^(2)//2m . 'p' is momentum, how kinetic energy is equal E_(k)=p^(2)//2m ? Think)

Motion of Mass Center in Vector Form A 2.0 kg particle has a velocity of vecv_1=(2.0hati-3.0hatj) m /s, and a 3.0 kg particle has a velocity vecv_2=(1.0hati+6.0hatj) m/s. (a) How fast is the center of mass of the particle system moving? (b) Find velocities of both the particles in centroidal frame.

If p=7hati-2hatj+3hatk and q=3hati+hatj+5hatk , then find the the magnitude of p-2q.

The kinetic energy of a particle of mass m moving with speed v is given by K=(1)/(2)mv^(2) . If the kinetic energy of a particle moving along x-axis varies with x as K(x)=9-x^(2) , then The region in which particle lies is :

The SI unit of energy is J=kg m^(2)s^(-2) , that of speed v is ms^(-1) and of acceleration a is ms^(-2) . What of the formulae for kinetic energy (k) given below can you rule out on the basis of dimensional arguments (m stands for the mass of the body) : (a) K = m^(2)v^(2) (b) K = (1/2)mv^(2) ("c") K= ma (d) K = (3/16)mv^(2) (e) K=(1/2)mv^(2)+ma

ALLEN -RACE-Basic Maths (VECTORS)
  1. If vecv=(3hati+2hatj+6k) m/s and m=(2)/(7)kg then find kinetic energy ...

    Text Solution

    |

  2. Two force vectors each having magnitude 6N are oriented as 30^(@) from...

    Text Solution

    |

  3. If vecv=(4hati+3hatj+5k) m/s and m=(2)/(7)kg then find kinetic energy ...

    Text Solution

    |

  4. If vecP=Kvec(Q) (Here K is constant) then :-

    Text Solution

    |

  5. The dot product of two vectors of magnitudes 3 units and 5 units canno...

    Text Solution

    |

  6. If vecA=2hati+3hatj-hatk and vecB=-hati+3hatj+4hatk then projection of...

    Text Solution

    |

  7. If |hatAxxhatB|=-sqrt(3)hatA.hatB, then |hatA-hatB|=…………………..

    Text Solution

    |

  8. Find the torque of a force vecF=-3hati+hatj+5hatk acting at the point ...

    Text Solution

    |

  9. If the position vector vecr of a point is (hati+2hatj+3hatk)m and the ...

    Text Solution

    |

  10. The angle made by the vector vecA=hati+hatj with x-axis is

    Text Solution

    |

  11. Correct relation is :

    Text Solution

    |

  12. Two vectors vecA=3hati+2hatj+hatk" and "vecB=5hatj-9hatj+Phatk are per...

    Text Solution

    |

  13. If the vectors (hati+hatj+hatk) and 3 hati form two sides of a triangl...

    Text Solution

    |

  14. The vector projection of a vector 3hat(i)+4hat(k) on y-axis is

    Text Solution

    |

  15. Consider two vectors vecF(1)=2hati+5hatk and vecF(2)=3hatj+4hatk. The ...

    Text Solution

    |

  16. When vecA.vecB=-|vecA||vecB|, then :-

    Text Solution

    |

  17. The component of vector A=a(x)hati+a(y)hatj+a(z)hatk and the directioi...

    Text Solution

    |

  18. (vecA+2vecB).(2vecA-3vecB):-

    Text Solution

    |

  19. If vecA=3hati+4hatj and vecB=6hati+8hatj, select correct alternatives ...

    Text Solution

    |

  20. The angle between the vectors (hati+hatj) and (2^(1/2)hatj+hatk)) is

    Text Solution

    |