Q3 of 19 Page 116

Answer the following

Which of the following has greater momentum?


a. An object of mass 2 kg moving with uniform velocity of 2 ms-1.


b. An object of 1 kg mass moving with uniform velocity of 3 ms-1.

A. An object of mass 2 kg moving with uniform velocity of 2 ms-1.

Explanation: Momentum is defined as the product of the mass and the velocity of the object, i.e.



Where p is momentum of the object and m, v represents mass and the velocity respectively.


Case 1: Information from the question:


Mass of the object = 2 kg


Velocity of the object = 2 ms-1


Hence for momentum,


Momentum of an object = mass × velocity


= 2 × 2


= 4 kg ms-1


Case 2: Information from the question:


Mass of the object = 1 kg


Velocity of the object =3 ms-1


Hence for momentum,


Momentum of an object= mass × velocity


= 1 × 3


= 3 kg ms-1


Now, momentum in Case 1 is more than in Case 2. Hence we can observe that momentum is quantity which depends on both mass as well as velocity of the object.


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