[size=4]A stone is released from a hot air balloon that is descending at a constant speed of 10 m/s. Neglecting air resistance, after 20 s the speed of the stone is:[/size]

[size=4][cmimg]0/12003026_95H7UFMI.png[/cmimg]

[/size]

[size=4]small drone ascends straight upward along the y-axis at a constant speed of 15 m/s. At the same instant the drone passes directly over a launcher on the ground (y = 0), a rock is thrown straight upward from the ground with initial speed v0 = 64 m/s. The only acceleration acting on the rock is gravity, g = 9.8 m/s2 downward. How long does it take for the rock to catch up to the drone?[/size]

[size=4]Identical guns fire identical bullets horizontally at the same speed from the same height above level planes, one on the Earth and one on the Moon. Which of the following three statements is/are true?



     I. The horizontal distance traveled by the bullet is greater for the Moon.



     II. The flight time is less for the bullet on the Earth.



     III. The velocity of the bullets at impact are the same.[/size]

[size=4]A baseball is hit straight up and is caught by the catcher 2.0 s later. The maximum height of the ball during this interval is:[/size]

[size=4][cmimg]0/12003026_SI890JU9.png[/cmimg][/size]

[size=4]The resistance of resistor 1 is twice the resistance of resistor 2. The two are connected in parallel and a potential difference is maintained across the combination. Then:[/size]