Two identical bricks, each of mass m, head directly toward each other on a frictionless surface and collide. Brick A heads to the right and has twice the speed as brick B, which initially heads to the left.
They collide and stick together. The collision lasts a time t. What is the magnitude of the average force on A during the collision?
2v
A
$\frac{mv}{2t}$
$\frac{mv}{3t}$
$\frac{3mv}{2t}$
$\frac{2mv}{3t}$
$\frac{7mv}{3t}$
V
B