Recent content by ppl k1ll3r

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Minus because the momentum of the torpedo being shot forward causes the sub to move back. Also, shouldn't the torpedo have a speed of 22.5 m/s, since its 21 m/s relative to the sub, so it has a speed of 22.5? Like say if you're running at 2m/s and you throw a tennis ball at 5 m/s, the speed of...

Anyone!?

Homework Statement A 60 tonne submarine, intially traveling forward at 1.5 m/s, fires a 500 kg torpedo striaght ahead with a velocity of 21 m/s in relation to the submarine. What is the velocity of the submarine after it fires the torpedo? Answer: 1.3 m/s [forward] Homework Equations...

Yeah that is right if you are considering from compressed pos. If it is from relaxed position, you might have to subtract 0.119. Is the answer 0.597m?

A 7 g bullet is fired into a 13.43 kg wood block that is at rest on a wood table. The block, with the bullet embedded, slides 5.92 cm across the table. What was the speed of the bullet? You know that during a collision, momentum is conserved: p = p' (' means final) (Mbullet)(Vbullet) =...

Thanks, makes sense now.

But say everything is stationary, then she throws the kit, doesn't that cause her to move in the same direction as the throwing movement pulls her forward? I can't really visualize this. Also, can you expand on why those 2 things moving in same direction would not result in the conservation of...

Homework Statement You have been hired to check the technical correctness of an upcoming made-for-TV murder mystery. The mystery takes place in a space shuttle. In one scene, the astronaut's safety line is sabotaged while she is on a space walk, so she is no longer connected to the space...