A 9.50-g bullet, moving horizontally withan initial speed v0, embeds itself in a 1.45-kg pendulum bob that isinitially at rest. The length of the pendulum is L = 0.745 m. Afterthe collision, the pendulum swings to one side and comes to restwhen it has gained a vertical height of 12.4 cm. (a) Is the kineticenergy of the bullet–bob system immediately after the collisiongreater than, less than, or the same as the kinetic energy of thesystem just before the collision? Explain. (b) Find the initial speedof the bullet. (c) How much time does it take for the bullet–bobsystem to come to rest for the first time?

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