Question

One end of a string is attached to a fine of of a string is attached to a ring of negligible mass that is free to slide along a pole without friction. A transverse wave pulse generated at the other end of the Ise generated at the other end of the string moves toward the ring as shown above, and is reflected. Properties of the reflected pulse include which of the following? I. It moves faster than the incident pulse. II. It has greater amplitude than the incident pulse. III. It is on the same side of the string as the incident pulse. A. I only C. I and II only E. I, II, and III B. III only D. II and III only A small speaker emits a pulse of sound. The sound has intensity I when it reaches Person 1 at a distance r from the speaker. What is the intensity of the sound when it reaches Person 2 at a distance 2r from the speaker? A. 1 C. 1 E. 411 B. D. 211 A block on a horizontal surface of negligible friction is placed in contact with an ideal spring, as shown above. The block is moved to the left so that the spring is compressed a distance x from equilibrium and then released from rest. The block has kinetic energy Ki when it separates from the spring. When the spring is compressed a distance 2x and the block is released from rest, the kinetic energy of the block when it separates from the spring is A. K1/2 c. (2) K1 E. 4K B. K1 D. 2K1

Answer 1

. ov @ @ I only, the ring will slide based on amplitude that will produce same side nave with same speed. & Amplitude. we know I a to s Indon 4k, we know spring will leave block at ito KE= 2 kr k spring constent .KE, zk, = ₂ km² at centre Nova KEz z kq 2 h k(2x)? 2 & k,