How high can you throw a rock if you can throw the ball 58.8 m/s straight up?

-- Gravity slows the ball by 9.8 m/s every second. So it slows to zero and reached its highest point in

(58.8 / 9.8) = 6 seconds .

-- Its average speed all the way up is

(1/2) (58.8 + 0) = 29.4 m/s

-- Traveling for 6 seconds at an average speed of 29.4 m/s, the ball covers

(6) (29.4) = 176.4 meters .

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.