A 4 kg ball moving to the right at 5.0 m/s has an elastic head-on collision with a 2 kg ball that is initially at rest. After the collision the 2 kg ball is moving at 14 m/s. Calculate the final velocity of the 4 kg ball. Be sure your answer accounts for the correct magnitude and direction

Astone is dropped from a cliff and falls 9.44 meters. what is the speed of the stone when it reaches the ground? a. 13.6 m/sec b. 1.39 m/sec c. 185 m/sec d. 9.80 m/sec

What is the angular momentum of the bar about the axle?

When a lead acid car battery is recharged by the alternator, it acts essentially as an electrolytic cell in which solid lead(ii) sulfate is reduced to lead at the cathode and oxidized to solid lead(ii) oxide at the anode. suppose a current of is fed into a car battery for seconds. calculate the mass of lead deposited on the cathode of the battery.