Question

A long, uniform rod of mass 20.00 kg is pivoted at its top end. It is lifted a small angle and let go. When it reaches the very bottom of its swing, it is moving with angular speed ?o , and it has collision with a block of mass 3.000 kg that was originally at rest on a frictionless surface. After the collision the rod is seen to continue spinning in the same direction at 17.66 rad/s. As a result of the collision, the 3.000-kg block moves to the right along the frictionless surface, climbs the ramp and leaves at an angle of 16.96? when it is 1.840 m high. The block flies as a projectile and when it reaches the very top of its flight it has an elastic collision with a second, larger block, which was at rest on top of a 2.210-m high slide. As a result of the collision, the second block slides down the frictionless curved slide, after which it crosses a very long, flat rough section, and then hits a spring. The spring compresses 0.3000 m from its equilibrium position. The spring-constant of the spring is 1200 N/m. The block attaches to the spring and the system oscillates in simple harmonic motion with a period of 0.3630 s.

1. Find the velocities of blocks A and B immediately after they collide.

2. Find the initial angular speed of the rod, Wo

Answer 1

Ar K-E, 다 block Aepolt