Question

seriously not understanding.
please explain.

A rifle is used during the biathlon event in the Olympics. The rifle has a mass of 2.5 kg and the bullet has a mass of 0.02 kg. After it is shot, the bullet travels at a speed of 525 m/s. What is the total momentum of the rifle-bullet system after the bullet is shot?

A. 10.5 kgm/s
B. 1313 kgm/s
C. 1323 kgm/s
D. 0 kgm/s

Answer 1

so, is it set up;
(2.5)(525)-(.02)(525? @doc.brown

Answer 2

If you have a cloud of bees flying through space, you can find the momentum of one bee by multiplying her mass by her velocity.
To find the momentum of the cloud, you have to add up all the momenta of all the bees and add them together.
\(b_1+b_2+\dots b_n\)

Answer 3

Is the gun moving after its been fired?

Answer 4

\[p=m_1v_1+m_2v_2\]\[p=(2.5kg)(0m/s)+(0.02kg)(525m/s)\]\[p=0+10.5\frac{kg\cdot m}{s}\]0.02 has 1 significant figure so the answer should really be 10 kgm/s