A person attempts to knock down a large wooden bowling pin by throwing a ball at it.
The person has two balls of equal size and
mass, one made of rubber and the other of
putty. The rubber ball bounces back, while
the ball of putty sticks to the pin.
Which ball is most likely to topple the bowling pin?

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?