Calculate the final velocity right after a 113 kg rugby player who is initially running at 7.45 m/s collides head‑on with a padded goalpost and experiences a backward force of 18100 N for 5.50×10−2 s.

2 trucks are driving an icy road and coming towards a 4way perpendicular intersection and driver A is driving a 3100 kg truck north-ward at 22m/s while driver B goes eastward in a 1100kg truck, they crash and stick together travelin at 59◦ north of East. What is Car B's original speed?

A stationary golf ball (with a mass of 0.125kg) is struck by a golf club with an average force of 417N.  The ball and club are in contact for approximately 0.013 seconds.  Determine the velocity of the ball when it leaves contact with the club.  (Report your answer in m/s, but only enter the numerical value.)

A 1.5x105 kg barge is floating downriver in a fog with a velocity of i = m/s when it collides with a second barge with a mass of 3.0x105 kg heading across the river with a velocity of i = m/s. Immediately after impact, the second barge is headed 20° downriver with a speed of 4.5 m/s. Assume the current is negligible in this part of the river. a. What is the velocity of the second barge immediately after impact (in vector form)? b. Use conservation of momentum to find the velocity of the first barge immediately after impact (in vector form)? c. Was the collision elastic? If not, what was the change in kinetic energy? 20 Downriver