Grade 12th passMechanics

Consider the following two statements :
A. Linear momentum of a system of particles is zero
B. Kinetic energy of a system of particles is zero.
Then
a) A does not imply B and B does not imply A
b) A implies B but B does not imply A
c) A does not imply B but B implies A
d) A implies B and B implies A

satendra

12 Years agoGrade 12th pass

3 Answers

Sher Mohammad

12 Years ago

The option B is correct

Vasantha Kumari

12 Years ago

Linear momentum is a vector quantity while kinetic energy is a scalar quantity. Hence, when the linear momentum is zero, it does not mean kinetic energy need to be zero. But when kinetic energy is zero, the linear momentum has to be zero.

So, the right option is (c) A does not imply B but B implies A.

Thanks & Regards,

Vasantha Sivaraj,

askIITians faculty

Arun Kumar

12 Years ago

A doesn't implies B but B implies A.

See if kinetic energy is zero v or omega both are zero because mass can't be zero.

In case of rotational motion Linear momentum could be zero but it still it can have non zero kinetic energy because of other motion.

Thanks & Regards, Arun Kumar, Btech,IIT Delhi, Askiitians Faculty

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Consider the following two statements :A. Linear momentum of a system of particles is zeroB. Kinetic energy of a system of particles is zero.Thena) A does not imply B and B does not imply Ab) A implies B but B does not imply Ac) A does not imply B but B implies Ad) A implies B and B implies A

satendra

3 Answers

Sher Mohammad

Vasantha Kumari

Arun Kumar

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