A giant \"egg\" explodes as part of a fireworks display. The egg is at rest befo

Question

A giant "egg" explodes as part of a fireworks display. The egg is at rest before the explosion, and after the explosion, it breaks into two pieces, with piece B moving in the positive xdirection. The masses of both pieces are indicated in

What is the magnitude of the momentum |p A,i| of piece A before the explosion?

Express your answer numerically in kilogram meters per second.

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nothing

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Part B

During the explosion, is the magnitude of the force of piece A on piece B greater than, less than, or equal to the magnitude of the force of piece B on piece A?

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Please Choosegreater than less than equal to cannot be determined

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Part C

Part complete

The component of the momentum of piece B, pBx,f, is measured to be +500 kgm/s after the explosion. Find the component of the momentum pAx,f of piece A after the explosion.

Enter your answer numerically in kilogram meters per second.

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-500

nothing

Explanation / Answer

A)

Since the egg is at rest, the momentum PA,i = mAVA,i is zero.

B)

The momentum is conserved before and after the explosion

PA,i + PB,i = PA,f +PB,f

0 = PA,f + PB,f

PA,f = -PB,f

Then PA,f = -500 kg.m/s

C)

Since

F = dP/dt

and both pieces end with the same magnitude of momentum after the explosion, the forces between the pieces must be the same in magnitude (but opposite directions).

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