Nhận biết (M1)

stone rests on a frictionless, horizontal surface bullet of mass 6.00 g, traveling horizontally at 350, strikes the stone and rebounds horizontally at right angles to its original direction with a speed of 250. Find the direction of the velocity of the stone after it is struck in reference to the direction of the initial velocity of the bullet.

• A.
• B.
• C.
• D.