A ballistic pendulum may be used to measure the speed of a projétil. It comprises a block of wood of 2.5 kg suspended by a string of mass negligible. A bullet of mass equal to 10 grams is fired against the block, and after getting stuck in the block with that rises to a height of 65 cm. What is the speed of firing the bullet?
resolution:
\(\displaystyle pa=ma.v\)
\(\displaystyle pb=(ma+mb).d\)
\(\displaystyle pa=pb\)
\(\displaystyle ma.v=(ma+mb).d\)
\(\displaystyle 0,01v=(0,01+2,5).0,65\)
\(\displaystyle 0,01v=1,6315\)
\(\displaystyle v=163,15 m/s\)
resolution:
\(\displaystyle pa=ma.v\)
\(\displaystyle pb=(ma+mb).d\)
\(\displaystyle pa=pb\)
\(\displaystyle ma.v=(ma+mb).d\)
\(\displaystyle 0,01v=(0,01+2,5).0,65\)
\(\displaystyle 0,01v=1,6315\)
\(\displaystyle v=163,15 m/s\)