:::physics question::: A 2.6 kg block of wood sits on a table. A 3.0 gbullet, fi

Question

:::physics question:::

A 2.6 kg block of wood sits on a table. A 3.0 gbullet, fired horizontally at a speed of 360 m/s , goes completely through the block, emerging at a speed of 180 m/s .

2nd question:::

Olaf is standing on a sheet of ice that covers the football stadium parking lot in Buffalo, New York; there is negligible friction between his feet and the ice. A friend throws Olaf a ball of mass 0.400 kg that is traveling horizontally at 10.0 m/s . Olaf's mass is 65.9 kg

If Olaf catches the ball, with what speed vf do Olaf and the ball move afterward?

Express your answer numerically in meters per second.

Explanation / Answer

using momentum conservation,

initial = final momentum

2.6x0 + (0.003 x 360) = 2.6v + 0.003x180

v =0.208 m/s

-------------------------------------------------

Using momentum conservation,

0.400 x 10 +   65.9x 0   = ( 65.9 + 0.40) vf

vf =0.0603 m/s

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