Two balls A and B, of masses m and 2m are in motion with velocities 2v and v respectively. Compare the force needed to stop them in the same time.

2 : 1

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1 : 2

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1 : 1

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None of the above

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Solution

The correct option is C
1 : 1

Since the change takes place in the same time: ratio of force needed to stop the balls is equal to the ratio of their momentum.

FA / FB = (m)(2v) / (2m)(v) = 1 : 1

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Two balls A and B, of masses m and 2m are in motion with velocities 2v and v respectively. Compare the force needed to stop them in the same time.

The correct option is C 1 : 1Since the change takes place in the same time: ratio of force needed to stop the balls is equal to the ratio of their momentum. FA / FB = (m)(2v) / (2m)(v) = 1 : 1

The correct option is C
1 : 1

Since the change takes place in the same time: ratio of force needed to stop the balls is equal to the ratio of their momentum.

FA / FB = (m)(2v) / (2m)(v) = 1 : 1