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Question

Choose the correct statements regarding momentum.
Statement 1: Momentum has both direction and magnitude.
Statement 2: SI unit of momentum is kgms1.
Statement 3: A balanced force can create a change in velocity.
Statement 4: An unbalanced force can create a change in velocity.
Statement 5: A balanced force can create a change in momentum.
Statement 6: A unbalanced force can create a change in momentum.

A
All statements, except 5
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B
All statements except 5 and 3
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C
All statements except 1
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D
All statements except 2
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Solution

The correct option is B All statements except 5 and 3
Momentum is a vector quantity, as it has both magnitude and direction.
Let 'p' be the momentum, 'm' be the mass and 'v' be the velocity.
We know, momentum,p=m×v
The SI unit of momentum is kgms1.
Since, an unbalanced force can bring a change in motion i.e., velocity; and momentum depends on velocity. Momentum can be changed by the application of unbalanced force.
A balanced force cannot bring a change in the motion, thus balanced force cannot change momentum.

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