A hot-air balloon is rising upward with a constant speed of 2.14 m/s. When the balloon is 2.98 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?

On the earth, an astronaut throws a ball straight upward; it stays in the air for a total time of 3.0 s before reaching the ground again. If a ball were to be thrown upward with the same initial speed on the moon, how much time would pass before it hit the ground?A. 7.3 s B. 18 s C. 44 s D. 108 s

A man stands on the roof of a 15.0 m tall building and throws a rock with a velocity of magnitude 30.0 m/s at an angle of 30° above the horizontal. Ignoring air resistance, how long will it take for the rock to reach the ground?   a. 2.0 s b. 0.79 s c. 3.86 s d. 0.5 s

A ball is launched from ground level with an initial upwards velocity of 20 m/s and an initial horizontal velocity of 30 m/s.  How far from its starting position does the ball land assuming the ground is level?   E) 180 m   D)150 m   A) 30 m   B) 60 m   C) 120 m

A certain freely falling object, released from the rest, requires 2.5 s to travel the last 40 m before it hits the ground. What is the magnitude of the velocity of the object when it is 40 m above the ground.            3.3 m/s          3.5 m/s downward         3.8 m/s          4.2 m/s

An object is thrown in horizontal with an initial velocity v0= 10 m/s from the roof of a building 20 m tall. How far from the building does it hit the ground?   C. 15 m   E. No answer   A. 5 m   D. 20 m    B. 10 m

A fish swimming in a horizontal plane has velocity i = (4.00 î + 1.00 ĵ) m/s at a point in the ocean where the position relative to a certain rock is i = (16.0 î − 3.20 ĵ) m. After the fish swims with constant acceleration for 15.0 s, its velocity is  = (21.0 î − 6.00 ĵ) m/s.   In what direction is it moving?    ______________?       ° counterclockwise from the +x-axis

A ball is thrown with an initial speed of 20 m/s at an angle of 60° to the ground. If air resistance is negligible, what is the ball’s speed at the instant it reaches its maximum height from the ground?  a Zero  b 20 m/s  c 10 m/s  d 17 m/s  e 14 m/s

A group of students celebrate their first year of medical school with a hot-air balloon ride, which is rising upward with a constant speed of 3.0 m/s. When the balloon is  3.50 m above the ground, one of the students who is taking a selfie with the other students accidentally drops her smart phone over the side of the balloon (fortunately with a OtterBox case). With what speed would the phone hit the ground in m/s?  Note that the displacement of the phone dropping 3.50 m would be - 3.50 m.  For the same situation as Question 9, how long in seconds would the smart phone be in the air before it hits the ground?

A fish swimming in a horizontal plane has velocity i = (4.00 î + 1.00 ĵ) m/s at a point in the ocean where the position relative to a certain rock is i = (12.0 î − 3.60 ĵ) m. After the fish swims with constant acceleration for 17.0 s, its velocity is  = (19.0 î − 6.00 ĵ) m/s.