Question

You have two objects: a ball that is covered with the hook side of Velcro and an incline covered with the loop side of Velcro that is fixed onto a low-friction cart. The ball is dropped vertically onto the incline, which is at rest (see (Figure 1). When the ball collides with the incline, it sticks to it without moving relative to it. Figure 1 of 1

Answer 1

based upon relation between impulse and change in momentum

As cart is initially at rest, hence its momentum is zero so p_cix = p_ciy = 0 finally, cart is moving only along times axis hence p_cfx = +ve p_cfy = 0 Impulse is equal to change is momentum hence ball is imparting impulse to cart in both the directions and J_B only = 2 times J_B mc x(as there is more change in momentum along Y) and J_E mc x = 0 J_E mc Y = -ve hence IInd option is correct