A 0.08 kg bullet traveling at speed hits a 16.1 kg block of wood and stays in the wood. The block with the bullet imbedded in it moves forward with a velocity of 8.1 m/s. What was the velocity (speed) of the bullet immediately before it hit the block (in m/s)

1638.225ms-1

Explanation:

Mass of block= 16.1 Kg

Mass of bullet = 0.08Kg

Initial velocity of block= 0ms-1

Initial velocity of bullet=

Final velocity of bullet and wood= 8.1 ms-1

From Newton's third law:

Momentum before collision= momentum after collision

MAUA + MAUB= V(MA +MB)

(0.08×UA) + (16.×0)= 8.1(0.08+16.1)

0.08UA= 131.058

UA= 1638.225ms-1

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explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."