A student performs a ballisticpendulum
experiment using an apparatussimilar to that
shown in the figure.
Initially the bullet is fired atthe block while
the block is at rest (at itslowest swing point).
After the bullet hits the block,the block rises
to its highest position, seedashed block in the
figure, and continues swingingback and forth.
The following data isobtained:
the maximum height the pendulumrises is
at the maximum height thependulum sub-
tends an angle of36.9?,
the mass of the bullet is 77 g,and
the mass of the pendulum bob is884 g.
The acceleration of gravity is9.8m/s2 .
Determine the initialspeed of the projec-
tile.Answer in units of m/s.