Author Question: A puck with a mass m1 = 28.0 g moving at 1.00 m/s approaches a stationary puck with a mass m2 = 102 ... (Read 102 times)

stock · **on:** Jul 29, 2018

A puck with a mass m1 = 28.0 g moving at 1.00 m/s approaches a stationary puck with a mass m2 = 102 g on an air table and they undergo a two-dimensional elastic collision.

As a result of their interaction, the incident puck moves away with a speed v1 = 0.785 m/s and the other puck moves away with a speed v2 in a different direction. What is the angle between the velocities v1 and v2? A) 45.0
B) 90.0
C) 85.0
D) 123
E) 165

Question 2

A Doppler weather radar operates at a frequency of 3.40 GHz. The wave from this radar system reflects from an approaching weather system moving with a speed of 39.0 m/s. What is the difference in frequency between the outgoing and returning waves?

A) 442 Hz
B) 351 Hz
C) 419 Hz
D) 322 Hz
E) 670 Hz