A student performs a ballistic pendulumexperiment using an apparatus similar to thatshown in the figure.Initially the bullet is fired at the block whilethe block is at rest (at its lowest swing point).After the bullet hits the block, the block risesto its highest position, see dashed block in thefigure, and continues swinging back and forth.The following data is obtained:the maximum height the pendulum rises is2 cm,at the maximum height the pendulum subtends an angle of 29.9◦,the mass of the bullet is 90 g, andthe mass of the pendulum bob is 785 g.