In an elastic collision, a rigid sphere moving with velocity v1 collided head-on with another sphere of equal mass moving toward it, as shown in the picture. The second sphere had a velocity 2v1. What was the change in velocity of the first sphere after the collision?
A) v1, moving from left to right
B) v1, moving from right to left
C) 2v1, moving from left to right
D) 2v1, moving from right to left

Abanked road comer of radius 146 m is to be constructed. if the comer is designed for vehicles moving with a speed of 20.0 m/s, what should the banking angle be, in units of degrees?

What object a collides with object b and bounces back its final momentum is?

Asubject in a clinical research trial experiences a serious, unanticipated adverse drug experience. how should the investigator proceed, with respect to the irb, after the discovery of the adverse event occurrence? a. do not report the adverse drug experience to the irb since it is a common adverse experience.b. report the adverse drug experience to the irb only if there are several other occurrences.c. report the adverse drug experience as part of the continuing review report.d. report the adverse drug experience in a timely manner, in keeping with the irb's policies and procedures, using the forms or the mechanism provided by the irb.