A very heavy box of mass M is being lifted upward by a crane at a constant velocity u. A ball of mass m≪M is thrown at the box with velocity v at angle α.
If the ball hits the box at some time t, what are the x and y components of the velocity of the ball (vx(t),vy(t)) after the collision? Assume a perfectly elastic collision.
a) (−vcosα,∣vsinα−gt∣)
b) (−vcosα,−∣vsinα−gt∣)
c) (−vcosα,2u+∣vsinα−gt∣)
d) (−vcosα,2u−∣vsinα−gt∣)
e) Either a or b.
f) Either c or d.